Rare mineral, especially in gem quality. The deposit giving the most beautiful parts is in Tasmania.
It is a secondary oxidation mineral formed in lead veins infiltrated by chromium-laden fluids.
To learn more about the Crocoite, see Mindat.org->
The Encylopedia of gems in English is still under construction. Thanks to visit the encyclopedia of gems in French.
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Crocoite
- Translations : Crocoite, Crocoita, Crocoiet, Krokoit, 紅鉛鉱, рокоит, Crocoisita
- Synonym : Crocoisite, Callochrome, Lehmannite, Kollochrom
- Etymology : By reference to its colour, its name comes from the Greek "Krokos" = saffron.
- Discovery: 1882 by Beudant
- Type localityTsvetnoi Mine, Uspenskaya Mt, Berezovskoe Au Deposit (Berezovsk Mines), Berezovskii (Berezovskii Zavod), Ekaterinburg (Sverdlovsk), Sverdlovskaya Oblast', Middle Urals, Urals Region, Russia
Gemological data
- Chemical formula : PbCrO4
- Hardness (Mohs) : 2.5 - 3
- Density : 5.9 - 6.10
- Refractive index : nα = 2.290(2) nβ = 2.360(2) nγ = 2.660(2)
- Birefingence : 0.35
- Crystal system : Monoclinique
The gallery
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