Difference between revisions of "Sard"
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== Physical and Chemical Properties == | == Physical and Chemical Properties == | ||
| − | Fracture = conchoidal. Luster = vitreous to waxy. Streak = white | + | * Fracture = conchoidal. |
| − | + | * Luster = vitreous to waxy. | |
| − | + | * Streak = white | |
| − | + | * Mohs Hardness = 7.0 | |
| − | + | * Density = 2.6 g/ml | |
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== Comparisons == | == Comparisons == | ||
Revision as of 13:39, 23 October 2022
Description
A translucent orange to reddish-brown form of Chalcedony. Sard is darker than Carnelian, but otherwise a similar stone. Both have been mined or gathered since at least 3000 BCE. Water-worn pebbles of sard are found in Egypt, India, and several areas of Europe. It was popular for amulets and scarabs.
Synonyms and Related Terms
chalcedony; sardius; sardoine; sardine
Physical and Chemical Properties
- Fracture = conchoidal.
- Luster = vitreous to waxy.
- Streak = white
- Mohs Hardness = 7.0
- Density = 2.6 g/ml
Comparisons
Properties of Common Gemstones
Resources and Citations
- Mineralogy Database: Quartz
- Jack Odgen, Jewellery of the Ancient World, Rizzoli International Publications Inc., New York City, 1982
- A.Lucas, J.R.Harris, Ancient Egyptian Materials and Industries, Edward Arnold Publishers Ltd., London, 4th edition, 1962
- 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/Sard (Accessed Nov. 9, 2005)
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 22
- 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