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VS
Tephroite
Name
—
Mn²⁺₂(SiO₄)
Formula
—
Mineral Species
Entry type
—
Silicates
Chemical class
—
Orthorhombic
Crystal system
—
6
Mohs hardness
—
3.87–4.12
Specific gravity
—
Pale gray
Streak
—
Vitreous to greasy
Luster
—
{010}, distinct; {001}, imperfect
Cleavage
—
Pbnm
Space group
—
Olivine
Structural group
—
Tep · Grandfathered
IMA
—
1823
Named in
—
Brown, Red, Gray
Typical colors
—
Mn · Si · O
Elements
—