Sulfates: Cyanotrichite
Diagnostic card.
Cu 4 Al 2 SO 4 (OH) 12 * 2 (H 2 O)
Diamond orthogonality
Hardness not established
Specific weight 2.7-2.9
Cleavage is easily manifested
Blue color
Color in powder blue
Glitter silky
Occurs in the form of aggregates, raids or bundles of small needle crystals of blue or bluish-white color.
Diagnostic signs.
Melts in the flames, emitting a crackle; Easily soluble in acids.
Origin.
Cyanotrichite is a rare secondary mineral of copper deposits. There it is formed in the oxidation zone together with azurite, malachite, brochantite. Despite the "terrible" name (the color "cyan" - blue), to cyanides is not directly related and almost not poisonous (do not eat).
Place of Birth.
It was reported of his presence in Cap Garon in France, in Lavrion in Greece, in Clifton-Morcy in Arizona, in Rio Marina on the island of Elba.
Cyanotrichite, brochantite. Kounrad, Pribalkhash, Kazakhstan. Photo: © А.А. Evseev.
Cyanotrichite, brochantite. Grand View Lane, Arizona, USA. Photo: © А.А. Evseev.
Cyanotrichite, sod. Se. Nevsky deposit, Omsukchan district, Magadan region, Russia, the Russian Federation (CIS). Photo: © А.А. Evseev.
Carbonate-cyanotrichite. Balasauskandyk, NW Karatau, Kazakhstan, the CIS. Photo: © А.А. Evseev.
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Poisonous and radioactive dangerous stones and minerals
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Catalog of minerals and semi-precious stones of the world by groups
** - poisonous stones and minerals
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