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The authors conclude that if no contradictory visual evidence exists, synthetic gem corundum containing these visual features could erroneously be mistaken for heat-treated natural gems.
Most jewellers can detect a synthetic gem using a simple probe which costs about pounds 70.
Large colorless HPHT-grown synthetic gem diamonds from New Diamond Technology, Russia.
Various displays focus on aspects ranging from crystals to organic gems, phenomenal stones and even imitation and synthetic gem materials.

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