Formula: Ca3(V,Al,Fe)2(SiO4)3
Origin of name: For M. Goldman, American petrologist
Crystal system: Cubic
Crystal class: 4/m -3 2/m
Twinning:
Unit cell:
Colour: Dark green to brownish green
Diaphaneity:
Luster:
Habit: Crystals dodecahedral, microscopic, mostly anhedral; grains
Hardness: 6 to 7
Specific gravity: 3.74
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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