VS
Name
—
Ca₈(Si₂O₇)₂F₄
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
5–6
Mohs hardness
—
2.85–2.96
Specific gravity
—
—
Streak
—
Vitreous
Luster
—
Very good on {001}; distinct on {110}
Cleavage
—
P2_1/c
Space group
—
Wöhlerite
Structural group
—
Csp · Grandfathered
IMA
—
1876
Named in
—
Pale rose-red; in thin section, rose-red to colorless
Typical colors
—
Ca · Si · O · F
Elements
—