VS
Name
—
NaCa₂(Mg₄Cr)(Si₆Al₂)O₂₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
6
Mohs hardness
—
3.08
Specific gravity
—
Pale green
Streak
—
Vitreous
Luster
—
Perfect on {110}
Cleavage
—
C2/m
Space group
—
Amphibole
Structural group
—
Cprg · Approved
IMA
—
2011
Named in
—
Emerald-green to pale green
Typical colors
—
Na · Ca · Mg · Cr · Si · Al · O · H
Elements
—