Kämmererite is a very rare natural mineral that's a chromium bearing variety of the mineral clinochlore. The gemstone seraphinite comes from the same family of minerals.
Described in 1841 by Finnish mineralogist Nils Gustaf Nordenskiöld, it was named ten years later after August Alexander Kämmerer who was a chemist, author and senior official in the Mining Department of Russia.
Kämmererite is a very soft stone which grades just 2 to 2.5 on Mohs scale of mineral hardness. It's worth bearing in mind that house dust contains microscopic particles of quartz which grades 7 on Mohs scale. With harder minerals being able to scratch those which are softer, wiping dust off kämmererite may leave tiny scratch marks. For this reason it's worth storing these tumbled stones in a display cabinet to minimise the build-up of dust.
Kämmererite is also known as chromian clinochlore. Translucent crystals are even rarer than material which occurs in massive form and exhibit red to purplish-red or a cranberry-red colour. The term massive describes a mineral whose crystals do not exhibit any visible shape and occur as one large mass. The colour of kämmererite crystals is caused by the presence of chromium.
Although kämmererite can be found in a few countries around the world, the finest grades come from Turkey.
These rare kämmererite tumbled stones are highly polished and boast exceptional colour. They should be handled carefully and ideally as little as possible. Although sizes vary slightly from piece to piece they're classed as a large tumbled stone. We currently only have seventeen available all of which are featured in our two photos. Three of the stones are slightly smaller so have been categorised as 'medium' and priced accordingly.