General Information:
Chemical Formula:Ca4Be2Al2Si9O26(OH)2
Composition:(Molecular Weight = 935.07 gm)Calcium 17.14 %
CaBeryllium 1.93 %
BeAluminum 5.77 %
AlSilicon 27.03 %
SiHydrogen 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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