VS
Name
—
NaBSi₂O₅(OH)₂
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
3.5
Mohs hardness
—
2.44–2.46
Specific gravity
—
—
Streak
—
Vitreous, slightly pearly on cleavage surfaces
Luster
—
Perfect on {100}; imperfect on {102}, {010}
Cleavage
—
P2_1
Space group
—
—
Structural group
—
Sle · Grandfathered
IMA
—
1914
Named in
—
Colorless
Typical colors
—
Na · B · Si · O · H
Elements
—