VS
Name
—
Ca₄(Na,Ca)₄Be₄AlSi₇O₂₄(F,O)₄
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Tetragonal
Crystal system
—
5–5.5
Mohs hardness
—
3.01–3.02
Specific gravity
—
—
Streak
—
Vitreous
Luster
—
Distinct on {001}
Cleavage
—
I-4
Space group
—
—
Structural group
—
Mph · Grandfathered
IMA
—
1852
Named in
—
Honey-yellow, citron-yellow, sulfur-yellow, flesh-red, brick-red
Typical colors
—
Ca · Na · Be · Al · Si · O · F
Elements
—