Difference between revisions of "Grossular"
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== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | grossularite; hessonite; garnet; gooseberry garnet; | + | grossularite; hessonite; garnet; gooseberry garnet; grossulária (Port.) |
== Other Properties == | == Other Properties == | ||
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== Authority == | == Authority == | ||
| − | * | + | * Jack Odgen, ''Jewellery of the Ancient World'', Rizzoli International Publications Inc., New York City, 1982 |
* ''Van Nostrand's Scientific Encyclopedia'', Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976 | * ''Van Nostrand's Scientific Encyclopedia'', Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976 | ||
| Line 40: | Line 40: | ||
* ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998 | * ''The American Heritage Dictionary'' or ''Encarta'', via Microsoft Bookshelf 98, Microsoft Corp., 1998 | ||
| − | * | + | * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 06:49, 24 July 2013
Description
A calcium aluminum garnet that occurs in shades of pale green, amber, pink, red, brown, or black. Yellow brown to red grossular, called hessonite, was used for ancient engraved gems and was mined in Ceylon. Green grossular, called gooseberry garnet, is found in Siberia. Grossular garnets are also found in the Urals, Italy, Switzerland, Mexico, and the United States (Maine and New Hampshire).
Synonyms and Related Terms
grossularite; hessonite; garnet; gooseberry garnet; grossulária (Port.)
Other Properties
Fracture = conchoidal. Luster = vitreous to resinous. Streak = colorless. Birefringence = none. Dispersion = 0.028 Pleochroism = none.
Fluorescence is pale orange in longwave UV and yellow in shortwave UV
| Composition | Ca3Al2(SiO4)3 |
|---|---|
| Mohs Hardness | 7.0 - 7.5 |
| Density | 3.61 |
| Refractive Index | 1.734-1.740 |
Additional Information
Mineralogy Database: Grossularite
Authority
- Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
- Van Nostrand's Scientific Encyclopedia, Douglas M. Considine (ed.), Van Nostrand Reinhold, New York, 1976
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998
- C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979