Difference between revisions of "Carnelian"
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== Description == | == Description == | ||
A pale orange-red to deep red translucent stone that is a variety of [[chalcedony]]. Carnelian was mined or gathered as an ornamental stone since at least 3000 BCE. It is found in Egypt, India and areas of Europe as water-worn pebbles. Carnelian was popular for amulets and scarabs and is still used as gemstones. | A pale orange-red to deep red translucent stone that is a variety of [[chalcedony]]. Carnelian was mined or gathered as an ornamental stone since at least 3000 BCE. It is found in Egypt, India and areas of Europe as water-worn pebbles. Carnelian was popular for amulets and scarabs and is still used as gemstones. | ||
| − | + | [[File:35.1500-CR6505-d1.jpg|thumb|Carnelian amulet<br>MFA# 35.1500]] | |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
sard; cornelian; chalcedony; Karneol (Deut., Pol.); cornaline (Fr.); cornalina (Esp., Port.) | sard; cornelian; chalcedony; Karneol (Deut., Pol.); cornaline (Fr.); cornalina (Esp., Port.) | ||
| − | + | == Physical and Chemical Properties == | |
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Trigonal crystal system Fracture = conchoidal. Luster = vitreous to waxy. Streak = white. | Trigonal crystal system Fracture = conchoidal. Luster = vitreous to waxy. Streak = white. | ||
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| 2.6 | | 2.6 | ||
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[[File:image9_carnelian.jpg|thumb|Carnelian cabochon]] | [[File:image9_carnelian.jpg|thumb|Carnelian cabochon]] | ||
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[[media:download_file_464.pdf|Properties of Common Gemstones]] | [[media:download_file_464.pdf|Properties of Common Gemstones]] | ||
| − | + | ==Resources and Citations== | |
| − | + | * Mineralogy Database: [http://www.webmineral.com/data/Quartz.shtml Quartz] | |
| − | == | + | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "carnelian." Accessed 14 Sept. 2001 . |
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| − | * ''Encyclopedia Britannica'', http://www.britannica.com Comment: "carnelian." | ||
* C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 | * C.W.Chesterman, K.E.Lowe, ''Audubon Society Field Guide to North American Rocks and Minerals'', Alfred A. Knopf, New York, 1979 | ||
| − | * Wikipedia | + | * Wikipedia: http://en.wikipedia.org/wiki/Carnelian (Accessed Sept. 14, 2005) |
[[Category:Materials database]] | [[Category:Materials database]] | ||
Revision as of 10:43, 28 August 2020
Description
A pale orange-red to deep red translucent stone that is a variety of Chalcedony. Carnelian was mined or gathered as an ornamental stone since at least 3000 BCE. It is found in Egypt, India and areas of Europe as water-worn pebbles. Carnelian was popular for amulets and scarabs and is still used as gemstones.
Synonyms and Related Terms
sard; cornelian; chalcedony; Karneol (Deut., Pol.); cornaline (Fr.); cornalina (Esp., Port.)
Physical and Chemical Properties
Trigonal crystal system Fracture = conchoidal. Luster = vitreous to waxy. Streak = white.
| Composition | SiO2 |
|---|---|
| Mohs Hardness | 7.0 |
| Density | 2.6 |
Comparisons
Properties of Common Gemstones
Resources and Citations
- Mineralogy Database: Quartz
- Encyclopedia Britannica, http://www.britannica.com Comment: "carnelian." Accessed 14 Sept. 2001 .
- 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/Carnelian (Accessed Sept. 14, 2005)