Hauyne 0.30 ct – Rectangle Cut, Eifel

This hauyne weighs 0.30 ct and comes from the Eifel in Germany. It is worked in a rectangular cut and is untreated — very clear for a faceted hauyne and therefore a particularly rare unique piece, available only once.

The 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.

About hauyne

Hauyne 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: Hauyne, the rarest blue gemstone of the Eifel.

Hauyne 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.

Specifications

• Stone type: hauyne
• Weight: 0.30 ct
• Origin: Eifel, Germany
• Cut shape: rectangular
• Treatment: none, untreated
• Cutting: our own workshop
• Location: Austria
• Availability: unique piece, one only

Further single pieces from the same material can be found under Hauyne, rare species beyond it under More gemstones. Would you like your own rough stone cut, or an existing stone reworked? We take that on in our workshop — more under Services.