VS
Name
—
Ca₅(SiO₄)₂(CO₃)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5
Mohs hardness
—
3.02
Specific gravity
—
—
Streak
—
Vitreous to resinous
Luster
—
Perfect on {001}, poor on {100}, (001) ^ (100) = 79 ±
Cleavage
—
P2_1/a
Space group
—
Spurrite-Afwillite
Structural group
—
Spu · Grandfathered
IMA
—
1908
Named in
—
White to gray or lavender-gray; colorless in thin section
Typical colors
—
Ca · Si · O · C
Elements
—