General Information:
Chemical Formula:CaB2(SiO4)2
Composition:(Molecular Weight = 245.86 gm)Calcium 16.30 %
CaSilicon 22.85 %
SiBoron 8.79 %
B Oxygen 52.06 %
O Empirical Formula: CaB2Si2O8
Environment:Contact metamorphic rocks.
Locality:Danbury, Connecticut.
Name Origin:Named after its location.
Physical Properties: Cleavage:[001] Poor
Color:colorless, white, gray, brownish white, or straw yellow.
Density:2.97 - 3.02, Average = 2.99
Diaphaniety:Transparent to translucent
Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Disseminated - Occurs in small, distinct particles dispersed in matrix., Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Hardness:7 - Quartz
Luminescence:Fluorescent.
Luster:Vitreous - Greasy
Streak:white
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