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VS
Coombsite
Name
—
KMn²⁺₁₃(Si,Al)₁₈O₄₂(OH)₁₄
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Tetragonal
Crystal system
—
—
Mohs hardness
—
3
Specific gravity
—
—
Streak
—
—
Luster
—
—
Cleavage
—
—
Space group
—
—
Structural group
—
Cmb · Approved
IMA
—
1989
Named in
—
Pale yellowish brown
Typical colors
—
K · Mn · Si · Al · O · H
Elements
—