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Re: bad science - CSI Miami

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On Jan 24, 2007, at 10:53 AM, Andrew Kester, PE wrote:

Something tells me a diamond has a bit higher compressive strength than that.
D iamonds are hard--not strong. Hardness means resistance to indentation and surface scratching, so a common check for genuineness is a scratch test against a substance of known hardness, using Mohs scale:

Moh	Mineral			Brinell
10		Diamond	
9		Corundum		667
8		Topaz			304
7		Quartz			178
6		Feldspar		147
5		Apatite		137
4		Fluorspar		  64
3		Calcite			  53	
2		Gypsum		  12
1		Talc			    3
Mohs Scale Is Still Used in Mineralogy & Gemmology

Something to break the ice with at our next cocktail party…

Christopher Wright P.E. |"They couldn't hit an elephant at
chrisw(--nospam--at)skypoint.com   | this distance" (last words of Gen.
.......................................| John Sedgwick, Spotsylvania 1864)
http://www.skypoint.com/~chrisw/


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