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Author Topic: The warmth of gems  (Read 3438 times)

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Offline Tricky

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The warmth of gems
« on: March 05, 2008, 03:19:06 PM »
I have a friend who is into facetting of gems and he tells me that most gems when held in your fingers are normally warmer than any of the rocks foind nearby.  Can anyone confirms this

Offline shiver

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Re: The warmth of gems
« Reply #1 on: March 05, 2008, 06:07:09 PM »
Some stones are good conductors of heat, such as quartz, which draws heat away from the body when held and thus feels cold to the touch. A poor thermal conductor, such as amber, feels warm to the touch because it does not conduct heat away from the body.

Thermal conductivity is very low in most gemstones but is extremely high in diamond (from 1.6 to 4.8 times as great as in pure silver!).

This unusual property of diamond is the basis for several popular diagnostic probes that are used to distinguish Gems from they're numerous imitations.