Gruzdevite

gruzdevite

aktashite

wurtzite

metacinnabar

Images

Formula: Cu₆Hg₃Sb₄S₁₂
Valence: Cu¹⁺₆Hg²⁺₃Sb³⁺₄S^2-₁₂
Sulphosalt, sulphantimonite, mercury-bearing mineral, forms a series with aktashite
Crystal System: Trigonal
Specific gravity: 5.88 calculated
Hardness: 4 to 4½
Colour: Grey-black
Common impurities: Fe,As
Environments

Hydrothermal environments

Localities

At the type locality, the Chauvai Sb-Hg Deposit, Batken Region, Kyrgyzstan, gruzdevite is a low temperature hydrothermal mineral that is found intergrown with well-formed tetrahedral crystals of aktashite, 0.2 to 4 mm in size, growing on stibnite and cinnabar in veinlets. Associated minerals include fluorite, calcite, baryte, metacinnabar and wurtzite (AM 67.855, HOM).

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