Bazzite

Bazzite is a beryllium scandium cyclosilicate mineral with chemical formula: Be3(Sc,Fe)2Si6O18. It crystallizes in the hexagonal crystal system typically as small blue hexagonal crystals up to 2 cm length. It has a Mohs hardness of 6.5-7 and a specific gravity of 2.77 to 2.85.Hard to distinguish from blue beryl.Occurs in miarolitic cavities in granite, in alpine veins and in scandium bearing granitic pegmatites.
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General Information:
 Chemical Formula:
Be3(Sc,Al)2Si6O18
 Composition:
(Molecular Weight = 564.46 gm)
Scandium 11.95 % Sc
Beryllium 4.79 % Be
Aluminum 2.39 % Al
Silicon 29.85 % Si
Oxygen 51.02 % O 
 Empirical Formula:
Be3Sc1.5Al0.5Si6O18
 Environment:
Pegmatites and alpine-vein rocks.
 Locality:
Lake Maggiore, Italy.
 Name Origin:
Named after the Italian engineer, A. E. Bazzi.
Physical Properties:
 Cleavage:
[0001] Indistinct
 Color:
azure blue or dark blue.
 Density:
2.8
 Diaphaniety:
Translucent to subtranslucent
 Habits:
Crystalline - Fine - Occurs as well-formed fine sized crystals., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).,
 Hardness:
6.5 - Pyrite
 Luminescence:
Non-fluorescent.
 Luster:
Vitreous (Glassy)
 Streak:
pale bluish white
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