Bavenite

General Information:
 Chemical Formula:
Ca4Be2Al2Si9O26(OH)2
 Composition:
(Molecular Weight = 935.07 gm)
Calcium 17.14 % Ca
Beryllium 1.93 % Be
Aluminum 5.77 % Al
Silicon 27.03 % Si
Hydrogen 0.22 % H 
Oxygen 47.91 % O 
 Empirical Formula:
Ca4Be2Al2Si9O26(OH)2
 Environment:
Pegmatitic druses in granite.
 IMA Status:
Approved IMA 1960
 Locality:
Baveno, Lago Maggiore, Piedmont, Italy.
 Name Origin:
Named after its locality.
Physical Properties:
 Cleavage:
[010] Perfect
 Color:
white, green, pink, or brown.
 Density:
2.7
 Diaphaniety:
Transparent to translucent
 Habits:
Lamellar - Thin laminae producing a lamellar structure., Massive - Lamellar - Distinctly foliated fine-grained forms., Platy - Sheet forms (e.g. micas).
 Hardness:
5.5 - Knife Blade
 Luster:
Vitreous - Pearly
 Streak:
white
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