Formula: (Cr,V)2Ti3O9
Origin of name: after locality Olkhon Island, Lake Baikal, Russia
Crystal system: monoclinic
Crystal class: unknown
Twinning:
Unit cell:
Colour: black
Diaphaneity: opaque
Luster: metallic
Habit: platy inclusions, 1 to 20 mm by 50 to 150 mm long in rutile
Hardness: about 7
Specific gravity: 4.48
Cleavage:
Tenacity:
Streak: black
Synonyms/varieties:
Comments: series with schreyerite
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