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2,232 questions

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You have mentioned in corundum http://www.minerals.net/gemstone/sapphire_gemstone.aspx heat treatment can reduce inclusions and increase clarity . Please be kind enough to give more information on that . My email adress [email protected]

asked Jul 16, 2014 by Basith (120 points)

1 Answer

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Heat treatment can effect gemstones in many ways. Most often it changes or enhances the color, but it can also be used in certain gemstones to increase clarity. This likely has to do with the effect of the heat on the inclusions that either change their color to be more like the original stone, or perhaps burn out included substances.

answered Jul 21, 2014 by hershel (52,640 points)