Kuzminite

kuzminite

eglestonite

lavrentievite

kadyrelite

Images

Formula: HgBr
Normal halide, calomel group and forms a series with calomel
Specific gravity: 7 to 7.2
Hardness: 1½
Streak: Yellowish or creamy white
Colour: Colorless, bluish gray or dull white, sometimes with weak brown tint.
Solubility: Soluble in warm hydrochloric acid, readily soluble in aqua regia, darkens in KOH
Environments

Hydrothermal environments

Occurrence:

Localities

At the type locality, the Kadyrel' Hg occurrence, Oorash-Khem River Valley, Uyuk Range, Pi-Khem District, Tuva, Russia, kuzminite occurs as grains 0.3-0.5 mm, aggregates up to 2.0 mm and powdery masses in vugs in mercury sulphides, in calcite veins in a mercury ore deposit. Associated minerals include eglestonite, lavrentievite, kadyrelite, calomel, mercury, corderoite, cinnabar, calcite and iron oxides (AM 73.192).

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