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| May/June 2005 |
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Market Sees Increase of Synthetic Ruby June 3, 2005 The Gemological Institute of America (GIA) has reported that synthetic ruby — which has been altered to look like natural, heat-treated ruby — has recently been appearing on the gem market. The GIA Gem Laboratory has seen an increase in the number of synthetic rubies with flux-induced healed fractures that are being offered as heat-treated, natural rubies. The synthetic stones, which are reportedly coming from Bangkok, have been circulating in the New York trade for the past few weeks. The GIA Gem Laboratory has examined more than 20 synthetic rubies of this nature, which were melt-grown using the Verneuil technique. These stones have been quench-crackled, then heated with fluxing agents, to induce healing along the fractures. This mimics the healed fractures commonly seen in natural rubies that have been heat-treated. The rubies can be identified by careful examination with a loupe or microscope. All of the samples GIA examined revealed a typical pattern to the network of healed fractures and fine curved striae, and in many cases, tiny gas bubbles.
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