Gemologists use the hot point test to determine if a piece is a plastic imitation or coated in wax. Learn more about this destructive test here.
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Keep in mind that hot point testing is a destructive procedure. Gemologists should conduct this test on finished gems only as a last resort for identification.
You can purchase electrically heated hot points or you can make your own. Just insert the blunt end of a needle into a cork. To use, simply heat the needle over a small flame until the tip turns a dull red.
Do not use heavy liquids on a gem before hot point testing. In fact, it’s not a good idea to use heavy liquids for specific gravity testing on any porous stone. They will sweat out with heat and are very toxic to breathe.
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Keep in mind that hot point testing is a destructive procedure. Gemologists should conduct this test on finished gems only as a last resort for identification.
You can purchase electrically heated hot points or you can make your own. Just insert the blunt end of a needle into a cork. To use, simply heat the needle over a small flame until the tip turns a dull red.
Do not use heavy liquids on a gem before hot point testing. In fact, it’s not a good idea to use heavy liquids for on any porous stone. They will sweat out with heat and are very toxic to breathe.
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Gemologists use the hot point test to determine if a piece is a plastic imitation or coated in wax. Learn more about this destructive test here.
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