Difference between revisions of "Uvarovite"
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==Physical and Chemical Properties== | ==Physical and Chemical Properties== | ||
| − | * Cubic system with irregular closely packed crystals | + | * Cubic system with irregular closely packed euhedral crystals |
* Fracture = conchoidal or uneven | * Fracture = conchoidal or uneven | ||
* Luster = vitreous to resinous | * Luster = vitreous to resinous | ||
* Streak = white | * Streak = white | ||
* Fluorescence = not diagnostic | * Fluorescence = not diagnostic | ||
| + | * Pleochroism = none | ||
{| class="wikitable" | {| class="wikitable" | ||
Latest revision as of 14:56, 19 December 2022
Description
A rare, bright green Garnet composed of a calcium chromium silicate. Uvarovite was discovered in 1832 and named after Count Sergei Uvarov, a Russian mineral collector. Gemstone quality uvarovite is mined in the Ural Mountains, Norway, Finland, Poland (Silesia), Spain, South Africa, Canada, (Quebec), and in the United States (California, Pennsylvania).
Synonyms and Related Terms
garnet; uvarovita (Esp.); uvarovite (Port.); Uvarovit (Deut.); uvaroviet (Ned.)
Physical and Chemical Properties
- Cubic system with irregular closely packed euhedral crystals
- Fracture = conchoidal or uneven
- Luster = vitreous to resinous
- Streak = white
- Fluorescence = not diagnostic
- Pleochroism = none
| Composition | Ca3Cr2(SiO4)3 |
|---|---|
| Mohs Hardness | 6.5 - 7.5 |
| Density | 3.77 - 3.81 g/ml |
| Refractive Index | 1.798 - 1.864 |
Resources and Citations
- Mineralogy Database: Uvarovite
- Gem Identification Lab Manual, Gemological Institute of America, 2016.
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 354
- Encyclopedia Britannica, http://www.britannica.com Comment: "uvarovite" [Accessed 20 Sept. 2005].
- C.W.Chesterman, K.E.Lowe, Audubon Society Field Guide to North American Rocks and Minerals, Alfred A. Knopf, New York, 1979
- Wikipedia: Uvarovite (Accessed Sept. 20, 2005 and Dec 2022)
- Random House, Webster's Encyclopedic Unabridged Dictionary of the English Language, Grammercy Book, New York, 1997
- The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998