VS
Name
—
Na₂Be₂Si₆O₁₅·H₂O
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
6
Mohs hardness
—
2.55
Specific gravity
—
—
Streak
—
Vitreous, pearly on cleavage
Luster
—
Perfect on {001}, imperfect on {551}
Cleavage
—
C2/c
Space group
—
—
Structural group
—
Edy · Grandfathered
IMA
—
1887
Named in
—
White or colorless, also grayish blue, blue, violet, yellow; colorless in thin section
Typical colors
—
Na · Be · Si · O · H
Elements
—