Formula: Cr2O3
Origin of name: For Pentti Eskola, Finnish petrologist
Crystal system: Hexagonal
Crystal class: -3 2/m
Twinning:
Unit cell:
Colour: Black to blackish-green
Diaphaneity: Opaque
Luster: Metallic
Habit: Crystals long prismatic to thick platy
Hardness: 9
Specific gravity: 5.18
Cleavage: None
Tenacity:
Streak: Green
Synonyms/varieties:
Comments:
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