General Information:
Chemical Formula:
BeAl2O4
Composition:
(Molecular Weight = 126.97 gm)
Beryllium 7.10 % Be
Aluminum 42.50 % Al
Oxygen 50.40 % O
Empirical Formula:
BeAl2O4
Environment:
Granitic pegmatite dikes.
Locality:
Takowaja, Russia.
Name Origin:
From the Greek chrysos - "golden" and the mineral beryl.
Physical Properties:
Cleavage:
[110] Distinct, [010] Imperfect, [???] Imperfect
Color:
blue green, brown, brownish green, green, or gray.
Density:
3.5 - 3.84, Average = 3.67
Diaphaniety:
Transparent to translucent
Habits:
Twinning Common - Crystals are usually twinned., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Tabular - Form dimensions are thin in one direction.
Hardness:
8.5 - Chrysoberyl
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
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