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.