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Dominant species
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Elbaite
Chemical
Formula
Na(LiAl)3Al6Si6O18(BO3)3(OH)4
Species
Silicates
Crystal
System
Trigonal
Mohs
Scale
7
Specific
Gravity
3.069
Color
Green, red to pink, blue, orange, yellow, colorless, multicolored
Streak
White
Luster
Vitreous, Resinous
Refractive
Index
n = 1.633 - 1.651 n = 1.615 - 1.630
Diaphaneity
Transparent, Translucent
Cleavage
Poor/Indistincton and
Fracture
Irregular/Uneven, Conchoidal
Crystal Habit:Prismatic; striated
Geological Setting:Lithium-rich granitic pegmatites, metamorphic rocks and high temperature hydrothermal veins.
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