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Offline ghola
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garret
« Reply #10 on: July 03, 2011, 05:09:12 pm »
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There ya go. You have your first sample set. Quartz is a 7.00 on the hardness scale and topaz is 8.00. Find a few other gemstones and you can have a pretty nice set to check your stones with.

Here's a hardness scale on line for gemstones.

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http://www.gemstone-magic.com/mohs-scale-index.html


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Offline ghola
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« Reply #11 on: July 03, 2011, 07:15:24 pm »
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BTW, kabierkabier being able to spot by sight is the best thing you can do. Going to the university was a real good move.

Two cheap items I would suggest. A small high power flash light and a small cheap laser pointer. On clear type gems it helps check clarity and flaws or cracks.

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« Reply #12 on: July 03, 2011, 09:00:35 pm »
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Whichever diamond tester you choose, make sure it can also test for Moissanite by electrical and thermal conductivity. There's a lot of them "replacement diamonds" out there.

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"Gold rides an iron horse." (Old prospector Homefire)
Offline kabier2
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« Reply #13 on: July 04, 2011, 04:27:47 pm »
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hi thanks ghola for the list i visited the site interesting also am sub for the GIA newsletter having interesting test equipment but not for the hobby
thanks

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