Danburite
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Description
A colorless or yellow transparent crystal occasionally used as a Gemstone. Danburite is composed of calcium borosilicate. It was named for its first reported occurence in Danbury, Connecticut. Colorless danburite is mined in Japan and Mexico (San Luis Potosi) and yellow danburite is mined in Madagascar and Myanmar.
Synonyms and Related Terms
calcium borosilicate
Physical and Chemical Properties
- Orthorhombic system with prismatic crystals.
- Poor cleavage in one direction.
- Fracture = uneven to conchoidal.
- Luster = vitreous.
- Streak = colorless.
| Composition | CaB2Si2O8 |
|---|---|
| Mohs Hardness | 7.0 |
| Density | 3.0 g/ml |
Resources and Citations
- Mineralogy Database: Danburite
- R.F.Symmes, T.T.Harding, Paul Taylor, Rocks, Fossils and Gems, DK Publishing, Inc., New York City, 1997
- C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
- Wikipedia: http://en.wikipedia.org/wiki/Danburite (Accessed Sept. 7, 2005)