VS
Name
—
CaMn³⁺₆O₈(SiO₄)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Tetragonal
Crystal system
—
6
Mohs hardness
—
4.63
Specific gravity
—
—
Streak
—
Submetallic. Anisotropism: Weak. R1 {R 2: (470) 21.3–22.3, (546) 19.2–20.2, (589) 18.5–19.5, (650) 17.65–18.65
Luster
—
—
Cleavage
—
I4_1/acd
Space group
—
Braunite
Structural group
—
Nel · Approved
IMA
—
1979
Named in
—
Black; in reflected light, gray to brownish gray
Typical colors
—
Ca · Mn · O · Si
Elements
—