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Quartz
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12 Feb 2008
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Chrysoberyl
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12 Feb 2008
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Synthetic emeralds
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12 Feb 2008
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Natural emeralds
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12 Feb 2008
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Diamonds
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12 Feb 2008
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Synthetic ruby
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12 Feb 2008
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Diffused Blue Sapphire
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12 Feb 2008
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Foreign substance Filling in cavity / fissures in Corundum
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12 Feb 2008
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Advanced Heat Treatment (AHT) Sapphire
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12 Feb 2008
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Heated Sapphire
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12 Feb 2008
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Pailin Sapphire, before and after heat treatment.
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12 Feb 2008
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Unheated Burmese Sapphire
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12 Feb 2008
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Unheated Burmese Ruby
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12 Feb 2008
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