Formula: Na(V,Cr)Si2O6
Origin of name: for Natalya Frolova, Russian geologist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: bright green with yellowish tint
Diaphaneity:
Luster: vitreous to silky
Habit: small grains to 1 by 0.3 mm with fibrous structure, may be elongated to asbestiform
Hardness: 7
Specific gravity: 3.55
Cleavage: 1; {110} noticeable
Tenacity:
Streak: green
Synonyms/varieties:
Comments:
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