Väyrynenite: a pink collector's stone from the Karakoram

Most people have never heard the name väyrynenite — and even among collectors a cut stone is something special. That is not for want of beauty, but down to two things: the material is rare, and it is difficult to cut.

A phosphate with manganese and beryllium

Väyrynenite is a manganese beryllium phosphate. It is named after the Finnish mineralogist Heikki Väyrynen and was first described from Finland. The manganese gives it its colour: a delicate to strong pink, often with a warm cast towards orange or salmon.

It forms in granite pegmatites — the same coarsely crystalline rocks that tourmaline, aquamarine and topaz come from. There it appears as a late formation, once phosphorus, beryllium and manganese have concentrated in the residual melt.

Cuttable almost only from Pakistan

Väyrynenite is documented in several places around the world, but mostly only as tiny, cloudy grains. Clear, facetable crystals come almost exclusively from the pegmatites of northern Pakistan, in the Gilgit-Baltistan region of the Karakoram. Even there it is no regular find, but turns up only occasionally alongside other pegmatite minerals.

The crystals are mostly small and slender. Cut stones above half a carat are rare, and clean stones beyond that an exception.

Why it is so rarely cut

With a Mohs hardness of around 5, väyrynenite is comparatively soft and has pronounced cleavage. A wrong pressure, too much heat or a carelessly set facet angle — and the stone splits along a plane. It can only be cut with a great deal of patience, fine laps and an orientation that respects the cleavage direction.

That is also why you hardly find väyrynenite in the trade: many rough pieces are lost in the cutting, and for mass production the material simply does not pay. Every finished stone is the result of long individual work.

What to look for when buying

• Colour: what is sought is a clear, even pink to orange-pink. Very pale stones are more common.
• Clarity: small inclusions and fine cleavage cracks are usual. Cracks reaching through to the surface are worth watching for.
• Treatment: to current knowledge väyrynenite is not treated. Asking the question never hurts all the same.
• Confusion: pink tourmaline, morganite, rhodochrosite or pink topaz can look similar. A reliable identification is only possible gemmologically.

Wearing and care

Väyrynenite is a collector's stone. In jewellery it belongs at most in protected settings of pendants or earrings that are not exposed to knocks. Ultrasound, steam and rapid temperature changes are out of the question; clean it with lukewarm water and a soft cloth.

How we cut väyrynenite

With a material this delicate we prefer calm step cuts. Long, slender crystals we like to cut as a baguette: the shape follows the rough piece, preserves plenty of weight, and the broad steps show the pink as a clear surface. We choose the orientation so that the cleavage plane lies, as far as possible, not parallel to a large facet.

Our cut stones can be found under Väyrynenite. On further rare species, read our pieces on hauyne from the Eifel and grandidierite from Madagascar. And if you have rough material of your own that should be cut, you will find everything further under Services.