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Put any two minerals side by side — formula, structure, hardness, density and more. Type to search each slot.

VS
O
Oxy-chromium-dravite
Name
—
NaCr₃(Cr₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
7.5
Mohs hardness
—
3.32
Specific gravity
—
Green
Streak
—
Vitreous
Luster
—
—
Cleavage
—
R3m
Space group
—
Tourmaline
Structural group
—
Ocdrv · Approved
IMA
—
2011
Named in
—
Emerald-green
Typical colors
—
Na · Cr · Mg · Si · O · B · H
Elements
—