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Dominant species
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Sinhalite
Sinhalite
Chemical
Formula
MgAl[O
Species
Borates
Crystal
System
Orthorhombic
Mohs
Scale
6-7
Specific
Gravity
3.45
Color
Colorless, pale gray, pale yellow, pale pink, green-brown to dark brown
Streak
colorless/white
Luster
Vitreous, Sub-Vitreous, Resinous
Diaphaneity
Translucent
Cleavage
None Observed
Fracture
Sub-Conchoidal
Crystal Habit:crystals very rare, usually in granular masses

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