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Painting Techniques
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Authentic vs. Treated Gems
Painting Techniques
Painting Techniques

Painting techniques have been around even longer than doublets or triplets. Most often cabochon-cut gems are painted, since it's easier to paint an un-faceted gem without showing markings. Some few rubies, emeralds and star-sapphires are painted or dyed. In jade, coral, lapis lazuli and opal dying or painting is exceptionally frequent. Gem enhancement and gem-painting has been around for a long, long time- so every gem is suspect in that sense. This doesn't automatically mean that all colored gems aren't real. Many are originals that have been dyed to simply enhance color and subsequently market-value. The market is so well-used to this fact by now that practically all good-grade gems automatically come with a grading report. However, some types are systematically fabricated and dyed to look like originals, and this something to look out for in black onyx, black opal, carnelian, chrysoprase and the other gems already listed.

 

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