VS
Name
—
Ca₂(Mg₄.₅₋₂.₅Fe²⁺₀.₅₋₂.₅)Si₈O₂₂(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5–6
Mohs hardness
—
3.03–3.24
Specific gravity
—
White
Streak
—
Vitreous, silky
Luster
—
Good on {110}, with intersections of 56± and 124±; parting on {100}
Cleavage
—
C2/m
Space group
—
Amphibole
Structural group
—
Act · Approved
IMA
—
1794
Named in
—
Green
Typical colors
—
Ca · Mg · Fe · Si · O · H
Elements
—