Diamond: Difference between revisions
(Hardest naturally occurring substance, some exotic cabron structures are harder.) |
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The hardest naturally occurring substance known to man, '''diamonds''' are a crystalline form of pure carbon. Prior to modern day discoveries in Brazil and South Africa, the only known source of diamonds was [[India]]. In [[ancient]] times diamonds were called ''adamant'', meaning "indestructable". |
The hardest naturally occurring substance known to man, '''diamonds''' are a crystalline form of pure carbon. Prior to [[modern]] day discoveries in Brazil and South Africa, the only known source of diamonds was [[India]]. In [[ancient]] times diamonds were called ''adamant'', meaning "indestructable". Most diamonds are irregular in shape and rather unappealing to the eye. The color ranges from dull yellow to dirty brown. |
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Jewel grade |
Jewel grade diamonds—colorless stones having a perfect crystalline shape—are extremely rare, and the technology for cutting and polishing them did not exist until the early [[Renaissance]]. As a result, diamond jewelry was more or less non-existant in [[Europe]] during the [[Middle Ages]]. Polishing with diamond dust and grindstones began in Burgundy c.1400. In 1465 the first diamond cutter was recorded in Belgium, and by 1610 the diamond cutting trade was well established in Antwerp. Early diamond cutting was fairly simple. The ''Mazarin'' cut did not appear until 1650. The ''Peruzzi'' cut, invented c.1700, eventually developed into the ''brilliant'' cut of modern times. |
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''See also:'' |
''See also:'' |
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== References: == |
== References: == |
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*Sydney H. Ball, ''A Roman Book on Precious Stones'' (includes Eng. trans. of C. Plinii Secundi ''liber xxxvii de Naturalis Historia''), Los Angeles, 1950 |
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*[http://www.pbm.com/~lindahl/cariadoc/gemstones.html Cariadoc's ''"On gemstones"''] |
*[http://www.pbm.com/~lindahl/cariadoc/gemstones.html Cariadoc's ''"On gemstones"''] |
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*Eduard |
*Eduard Gübelin & Franz-Xaver Erni, ''GEMSTONES: Symbols of Beauty & Power'', Tuscon AZ, 2000 |
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*Walter Schumann, ''Gemstones of the World'', New York, (rev) 1997 |
*Walter Schumann, ''Gemstones of the World'', New York, (rev) 1997 |
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The following photos may prove useful (you may need to scroll down to view): |
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*[http://www.gemnation.com//base?processor=getPage&pageName=diamond_cutting]uncut diamond (from Gemnation.com) |
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*[http://www.diamondhelpers.com/ask/0024-cutfaceting.shtml]diamond in the rough (Diamond Helpers.com) |
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*[http://en.wikipedia.org/wiki/Image:Diamond_cut_history.png]historical diamond cuts (Wikipedia.org) |
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[[category:gemstones]] |
[[category:gemstones]] |
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Latest revision as of 14:10, 28 August 2006
The hardest naturally occurring substance known to man, diamonds are a crystalline form of pure carbon. Prior to modern day discoveries in Brazil and South Africa, the only known source of diamonds was India. In ancient times diamonds were called adamant, meaning "indestructable". Most diamonds are irregular in shape and rather unappealing to the eye. The color ranges from dull yellow to dirty brown.
Jewel grade diamonds—colorless stones having a perfect crystalline shape—are extremely rare, and the technology for cutting and polishing them did not exist until the early Renaissance. As a result, diamond jewelry was more or less non-existant in Europe during the Middle Ages. Polishing with diamond dust and grindstones began in Burgundy c.1400. In 1465 the first diamond cutter was recorded in Belgium, and by 1610 the diamond cutting trade was well established in Antwerp. Early diamond cutting was fairly simple. The Mazarin cut did not appear until 1650. The Peruzzi cut, invented c.1700, eventually developed into the brilliant cut of modern times.
See also:
References:
- Sydney H. Ball, A Roman Book on Precious Stones (includes Eng. trans. of C. Plinii Secundi liber xxxvii de Naturalis Historia), Los Angeles, 1950
- Cariadoc's "On gemstones"
- Eduard Gübelin & Franz-Xaver Erni, GEMSTONES: Symbols of Beauty & Power, Tuscon AZ, 2000
- Walter Schumann, Gemstones of the World, New York, (rev) 1997
The following photos may prove useful (you may need to scroll down to view):
![[3]](http://en.wikipedia.org/wiki/Image:Diamond_cut_history.png){kind=link}