Hambergite
Chemical Formula	Be2BO3OH
Species	Borates
Crystal System	Orthorhombic
Mohs Scale	7
Specific Gravity	2.347-2.372
Color	Colorless, pale gray, pale yellow
Streak	White
Luster	Vitreous
Refractive Index	n = 1.554 - 1.560 n = 1.587 - 1.591 n = 1.628 - 1.631
Diaphaneity	Transparent, Translucent
Cleavage	PerfectOn ; on good.
Crystal Habit：Prismatic crystals
Geological Setting：Alkali-rich pegmatites (Madagascar); gem gravels (Kashmir).