{"title":"Hauyne","description":"\u003cp\u003eHauyne from the Eifel — one of the rarest facetable minerals there is. We select the rough ourselves and cut every stone in our own workshop. Cut hauynes above one carat are considered exceptional among collectors; most fall well below that.\u003c\/p\u003e","products":[{"product_id":"hauyn-0-09ct-rechteck-eifel","title":"Hauyne 0.09 ct – Rectangle Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.09 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in a \u003cstrong\u003erectangular cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — very clean, and therefore a particularly rare unique piece, available only once.\u003c\/p\u003e\n\u003cp\u003eThe rectangular cut lets the colour stand as a calm, unbroken surface instead of splitting it into many small reflections. With a material that draws its value above all from colour, that is often the more honest choice.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.09 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: rectangular\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046369427781,"sku":"HAU-EIF-009-REC","price":200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-09ct-rectangle_2981cd53-aef5-4877-a1a1-516f6e889d72.jpg?v=1791571797"},{"product_id":"hauyn-0-14ct-rund-eifel","title":"Hauyne 0.14 ct – Round Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.14 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in a \u003cstrong\u003eround cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — colour and clarity are as they were laid down in the rough material. Like every stone from our workshop it is a unique piece, available only once.\u003c\/p\u003e\n\u003cp\u003eThe round cut brings out the maximum brilliance the material has to offer: every facet works towards one point, and the light returns evenly to the eye. The classic choice when fire is meant to take the lead.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.14 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: round\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046369460549,"sku":"HAU-EIF-014-RUN","price":250.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-14ct-round_58a37f67-a524-4930-bbfb-ad7a242fc3e4.jpg?v=1791571797"},{"product_id":"hauyn-0-16ct-trilliant-eifel","title":"Hauyne 0.16 ct – Trilliant Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.16 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in a \u003cstrong\u003etrilliant cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — colour and clarity are as they were laid down in the rough material. Like every stone from our workshop it is a unique piece, available only once.\u003c\/p\u003e\n\u003cp\u003eThe trilliant cut picks up the triangular basic shape of many rough crystals. It shows a lot of surface at comparatively little loss of weight — a decisive argument with a material that rarely yields larger pieces.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.16 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: trilliant\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046369493317,"sku":"HAU-EIF-016-TRI","price":200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-16ct-trilliant_72af1647-c02b-46c4-88be-a0d6d5e49ac2.jpg?v=1791571797"},{"product_id":"hauyn-0-22ct-oktagon-eifel","title":"Hauyne 0.22 ct – Octagon Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.22 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in an \u003cstrong\u003eoctagon cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — colour and clarity are as they were laid down in the rough material. Like every stone from our workshop it is a unique piece, available only once.\u003c\/p\u003e\n\u003cp\u003eThe octagon cut breaks the four corners of the rectangle. That looks calmer, but above all it protects the vulnerable edges — a tangible advantage with a stone of this hardness when it is later set.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.22 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: octagon\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046369526085,"sku":"HAU-EIF-022-OKT","price":300.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-22ct-octagon_7a73f913-08e7-4598-a6c5-4a68af0bac91.jpg?v=1791571797"},{"product_id":"hauyn-0-26ct-fantasieschliff-eifel","title":"Hauyne 0.26 ct – Fancy Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.26 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in a \u003cstrong\u003efancy cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — very clear for a faceted hauyne and therefore a particularly rare unique piece, available only once.\u003c\/p\u003e\n\u003cp\u003eA fancy cut follows no standard pattern; it is designed for the individual crystal. Every facet sits where this piece of rough demands it — the design follows inclusions, colour distribution and shape, not the other way round.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.26 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: fancy cut\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046373523781,"sku":"HAU-EIF-026-FAN","price":1200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-26ct-fancy_344fa78a-035e-4d31-949f-9484496dd446.jpg?v=1791571797"},{"product_id":"hauyn-0-29ct-fantasieschliff-eifel","title":"Hauyne 0.29 ct – Fancy Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.29 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in a \u003cstrong\u003efancy cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — colour and clarity are as they were laid down in the rough material. Like every stone from our workshop it is a unique piece, available only once.\u003c\/p\u003e\n\u003cp\u003eWith a fancy cut the design emerges at the stone itself. Rather than forcing a finished shape onto it, we follow what the rough dictates — that takes more time, preserves weight, and guides the light to where the colour sits deepest.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.29 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: fancy cut\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046373556549,"sku":"HAU-EIF-029-FAN","price":600.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-29ct-fancy_29070284-3aab-4e44-91fc-46fbc0db0e62.jpg?v=1791571797"},{"product_id":"hauyn-0-30ct-rechteck-eifel","title":"Hauyne 0.30 ct – Rectangle Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.30 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in a \u003cstrong\u003erectangular cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — very clear for a faceted hauyne and therefore a particularly rare unique piece, available only once.\u003c\/p\u003e\n\u003cp\u003eThe rectangular cut, with its long, quiet facets, shows exactly what makes this stone: one large, coherent field of colour instead of many small reflections. At this clarity, that restraint pays off.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.30 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: rectangular\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046373589317,"sku":"HAU-EIF-030-REC","price":1500.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-30ct-rectangle_215835df-5d6f-4c53-9b85-e26bb91b72e2.jpg?v=1791571797"},{"product_id":"hauyn-0-32ct-fantasieschliff-eifel","title":"Hauyne 0.32 ct – Fancy Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.32 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in a \u003cstrong\u003efancy cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — colour and clarity are as they were laid down in the rough material. Like every stone from our workshop it is a unique piece, available only once.\u003c\/p\u003e\n\u003cp\u003eWith a fancy cut the rough decides the shape. We lay out the facets so that as little substance as possible is lost and the light returns where the blue is strongest — two goals that rarely agree of their own accord.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.32 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: fancy cut\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046376538437,"sku":"HAU-EIF-032-FAN","price":1200.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-32ct-fancy_69f9ffd1-5987-472a-9ce6-f0926eb79eab.jpg?v=1791571797"},{"product_id":"hauyn-0-38ct-rund-eifel","title":"Hauyne 0.38 ct – Round Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.38 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in a \u003cstrong\u003eround cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — colour and clarity are as they were laid down in the rough material. Like every stone from our workshop it is a unique piece, available only once.\u003c\/p\u003e\n\u003cp\u003eThe round cut is the benchmark every other cut has to measure up against: every facet works towards one point, and the light returns evenly to the eye. Symmetry and polish forgive no carelessness here.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.38 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: round\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046376603973,"sku":"HAU-EIF-038-RUN","price":800.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-38ct-round_022045d5-819c-4ec1-b657-43177c2d5261.jpg?v=1791571797"},{"product_id":"hauyn-0-51ct-trilliant-eifel","title":"Hauyne 0.51 ct – Trilliant Cut, Eifel","description":"\u003cp\u003eThis hauyne weighs \u003cstrong\u003e0.51 ct\u003c\/strong\u003e and comes from the Eifel in Germany. It is worked in a \u003cstrong\u003etrilliant cut\u003c\/strong\u003e and is \u003cstrong\u003euntreated\u003c\/strong\u003e — colour and clarity are as they were laid down in the rough material. At 0.51 ct it is among the larger stones this material yields at all.\u003c\/p\u003e\n\u003cp\u003eThe trilliant cut picks up the triangular basic shape of the rough crystal and shows a lot of surface at little loss of weight. That is exactly why the decision falls this way on a piece of this size: with hauyne, every hundredth of a carat that does not end up in the grinding slurry is a real gain.\u003c\/p\u003e\n\u003ch3\u003eAbout hauyne\u003c\/h3\u003e\n\u003cp\u003eHauyne belongs to the sodalite group and carries the name of the French mineralogist René Just Haüy. In cuttable quality it comes almost exclusively from the volcanic region of the Eifel, where it occurs as tiny crystals in the ejecta around Lake Laach. Cut stones above one carat count as an exception among collectors. We have described this in detail in our guide: \u003ca href=\"\/en\/blogs\/guide\/hauyne-eifel\"\u003eHauyne, the rarest blue gemstone of the Eifel\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eHauyne is sought after above all for its colour: a deep cornflower to neon blue that hardly any other mineral reaches at this intensity. With a Mohs hardness of about 5.5 to 6 it is soft and readily cleavable. That makes it demanding to cut and recommends it for the collection, for pendants or earrings rather than for a ring worn every day.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStone type: hauyne\u003c\/li\u003e\n\u003cli\u003eWeight: 0.51 ct\u003c\/li\u003e\n\u003cli\u003eOrigin: Eifel, Germany\u003c\/li\u003e\n\u003cli\u003eCut shape: trilliant\u003c\/li\u003e\n\u003cli\u003eTreatment: none, untreated\u003c\/li\u003e\n\u003cli\u003eCutting: our own workshop\u003c\/li\u003e\n\u003cli\u003eLocation: Austria\u003c\/li\u003e\n\u003cli\u003eAvailability: unique piece, one only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFurther single pieces from the same material can be found under \u003ca href=\"\/en\/collections\/hauyn\"\u003eHauyne\u003c\/a\u003e, rare species beyond it under \u003ca href=\"\/en\/collections\/weitere-edelsteine\"\u003eMore gemstones\u003c\/a\u003e. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under \u003ca href=\"\/en\/pages\/gemstone-cutting-services\"\u003eServices\u003c\/a\u003e.\u003c\/p\u003e","brand":"ManhArt Gemstones","offers":[{"title":"Default Title","offer_id":59046376636741,"sku":"HAU-EIF-051-TRI","price":1800.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/3503\/8021\/files\/hauyne-eifel-0-51ct-triangle_9ce2fd63-3706-48f7-87d9-50c28facca08.jpg?v=1791571797"}],"url":"https:\/\/manhart-gemstones.com\/en\/collections\/hauyn.oembed","provider":"Manhart Gemstones","version":"1.0","type":"link"}