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Danburite is a clear to white silicate mineral whose orthorhombic crystals are transparent to translucent (danburite can also be yellow, greenish, or brown); it resembles topaz. It was named for the city of Danbury in Fairfield County, Connecticut, USA.
CaB2Si2O8 - Calcium Boron Silicate
Class:
Subclass:
Colorless, white, gray, greenish, pinkish, yellow, brown, red-brown
White
Vitreous, dull
Transparent to translucent
3.0
7
Imperfect
Uneven to conchoidal
Prismatic crystals, columnar aggregates, granular, massive
Non-fluorescent
Frequency:
Uncommon
Origin:
Hydrothermal in pegmatite cavities, ore veins and the Alpine-type veins; metamorphic in skarns and contact metamorphosed rocks.

Occurence:
Danbury, Connecticut, USA; Russell, New ork, USA; Charcas, San Luis Potasi, Mexico; Dalnegorsk, Russia
Application:
Mineral specimen

 
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