VS
Name
—
Ca₂Mn²⁺₄Al₄[B₂Si₈O₃₀](OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Triclinic
Crystal system
—
6.5
Mohs hardness
—
3.35–3.43
Specific gravity
—
—
Streak
—
[Vitreous.]
Luster
—
[{100} good; {001}, {110}, {011}, poor] (by analogy to the axinite group)
Cleavage
—
P-1
Space group
—
Axinite
Structural group
—
Tnz · Approved
IMA
—
1968
Named in
—
Yellow, brownish yellow-green; orange to red in thin section
Typical colors
—
Ca · Mn · Al · B · Si · O · H
Elements
—