VS
Name
—
Ca₄₈Mg₁₆[AlSi₄O₁₅(OH)]₄(BO₃)₁₆(CO₃)₁₆·2(H₂O,HCl)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Hexagonal
Crystal system
—
—
Mohs hardness
—
2.95–2.96
Specific gravity
—
—
Streak
—
Vitreous
Luster
—
—
Cleavage
—
R-3m
Space group
—
Harkerite
Structural group
—
Hkr · Approved
IMA
—
1951
Named in
—
Colorless
Typical colors
—
Ca · Mg · Al · Si · O · H · B · C · Cl
Elements
—