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: Gift of Allan Caplan
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Research & News
Lab Notes
Resin Imitation Ivory with “Engine-Turned” Structure
Resin imitation ivory can display striations similar to those in elephant and mammoth ivory.
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Promotions
Latest Laboratory Promotions
View details about the latest diamond grading promotions.
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Industry Analysis
Diamond Market Recovery, Auction Results
World’s two largest diamond producers say market is stabilizing after several months of severe cutbacks in rough sales. Christie’s and Sotheby’s sales.
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Gem News International
Imitation Opal with Interesting Play-of-Color Pattern
New imitation opal displays pronounced play-of-color phenomenon in a unique pattern covering large surface areas.
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Lab Notes
Dyed Serpentine Imitating Sugilite
Advanced testing confirms dyed material as serpentine, rather than the sugilite it was meant to imitate.
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Gem News International
New Find of Deep Blue Nigerian Aquamarine
Nigerian aquamarine with exceptionally deep and saturated color also displays unusually strong pleochroism.
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