VS
Name
—
NaFe³⁺Si₂O₆
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Monoclinic
Crystal system
—
6–6.5
Mohs hardness
—
3.5–3.6
Specific gravity
—
Pale yellowish gray
Streak
—
Vitreous to slightly resinous
Luster
—
Good on {110}, (110) ^ (110) ~87°; parting on {100}
Cleavage
—
C2/c
Space group
—
Pyroxene
Structural group
—
Aeg · Approved
IMA
—
1835
Named in
—
Green, Black, Brown
Typical colors
—
Na · Fe · Si · O
Elements
—