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Formula: Cu6Hg3Sb4S12
Sulphosalt, mercury- and antimony-
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
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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