Formula: IrSbS
Origin of name: after locality Tolovka River, Russia
Crystal system: Isometric/cubic
Crystal class: Unknown
Twinning:
Unit cell: a = 6.027
Colour: Steel-gray
Diaphaneity: Opaque
Luster: Metallic
Habit: aggregates of corroded, anhedral grains with a skeletal isometric crystal outline, to 72 micron
Hardness: 7.5
Specific gravity: 10.50
Cleavage: None
Tenacity: Brittle, conchoidal fracture
Streak:
Synonyms/varieties:
Comments: Found in placers derived from an Alpine-type gabbro massif.
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