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Also expected: Sage / Sweetgrass from the U.S.A., Nag Champa from India and pink Amethyst from Patagonia in Argentina. Order in the webshop and with DHL from € 500, - delivered FREE in NL, Belgium, France, UK, Austria & Ireland. Or call for an appointment in Berghem.(Saterday 19th september we are closed)

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Cyanotrichite from Kamenushinskoe dep. Kemerovo region, Siberia, Russia


Cyanotrichite from Kamenushinskoe dep. Kemerovo region, Siberia, Russia


Cyanotrichite from Kamenushinskoe dep. Kemerovo region, Siberia, Russia


We sometimes come across special stones from Russia and Kazakhstan! Really nice stones that are only found in one place.




More information

Cyanotrichite is a hydrous copper aluminium sulfate mineral with formula Cu4Al2[(OH)12|SO4]·2H2O, also known as lettsomite. Cyanotrichite forms velvety radial acicular crystal aggregates of extremely fine fibers. It crystallizes in the orthorhombic system and forms translucent bright blue acicular crystal clusters or drusey coatings. The Mohs hardness is 2 and the specific gravity ranges from 2.74 to 2.95. Refractive indices are nα=1.588 nβ=1.617 nγ=1.655. It is an oxidation product of primary copper mineralization in a weathering environment with abundant aluminium and sulfate. Associated minerals include brochantite, spangolite, chalcophyllite, olivenite, tyrolite, parnauite, azurite and malachite. The main deposits are Cap la Garrone in the Var (France), Romania and Arizona (US). It was first described in 1839 from Moldova Nouă, Banat, Romania. The name is from Greek kyaneos for "blue" and triches for "hair" referring to the typical color and habit. Its earlier name, Lettsomite, is taken from the name of William Garrow Lettsom (1804–1887), co-author of the 1858 Manual of the Mineralogy of Great Britain and Ireland.