Formula: Mg3Cr2(SiO4)3
Origin of name: For Oleg von Knorring, English geologist
Crystal system: Cubic
Crystal class: 4/m -3 2/m
Twinning:
Unit cell:
Colour: Green
Diaphaneity:
Luster: Vitreous
Habit: Massive; minute grains
Hardness: ~ 7
Specific gravity: 3.76
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Series with pyrope
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