Difference between revisions of "Danburite"
Jump to navigation
Jump to search
(username removed) |
(username removed) |
||
| Line 30: | Line 30: | ||
== Additional Information == | == Additional Information == | ||
| − | Mineralogy Database: [http://www.webmineral.com/data/Danburite.shtml Danburite] | + | ° Mineralogy Database: [http://www.webmineral.com/data/Danburite.shtml Danburite] |
== Authority == | == Authority == | ||
| − | * | + | * 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, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Danburite (Accessed Sept. 7, 2005) | * Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Danburite (Accessed Sept. 7, 2005) | ||
Revision as of 06:29, 24 July 2013
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
Other 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 |
Additional Information
° Mineralogy Database: Danburite
Authority
- 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, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Danburite (Accessed Sept. 7, 2005)