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Formula: Au3S4Te6
Telluride, forms a series with
maletoyvayamite
Crystal System: Triclinic
Specific gravity: 7.347 calculated
Hardness:
Streak: Grey
Colour: Blueish grey
Environments
Tolstykhite is a new mineral. approved in 2022 and to date (March 2023) reported only from the type locality.
Localities
At the type locality, the Gaching occurrence, Maletoyvayam ore field, Kamchatka Krai, Russia, tolstykhite occurs in
the epithermal deposit as individual anhedral grains up to 0.05 mm or as intergrowths with native
selenium, native tellurium and
tripuhyite. Other associated minerals include
calaverite, fischesserite,
stibiogoldfieldite,
arsenogoldfieldite,
tennantite-(Cu),
tetrahedrite-(Zn), galena,
gold, maletoyvayamite,
famatinite–luzonite,
pyrite, baryte,
ilmenite, magnetite,
quartz and vanadium-bearing
rutile. Tolstykhite is bluish-grey, opaque with metallic lustre and grey
streak
(MM 87.10.34-39).
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