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Sapphire
The name “sapphire” can also apply to any corundum that’s not ruby red, another corundum variety.
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Article
Emerald: The Superstar of Trapiche Gemstones
Trapiche emeralds, which display a distinct six-spoke wheel pattern, set the standard as some of the finest and most spectacular crystals unearthed.
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Land of Origins: A Gemological Expedition to Ethiopia
Documents a visit to the sapphire, opal, and emerald mining and trading areas of Ethiopia.
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U-Pb Ages of Zircon Inclusions in Sapphires from Ratnapura and Balangoda (Sri Lanka) and Implications for Geographic Origin
Establishes a metamorphic origin for sapphire samples from these deposits, supported by their trace-element composition and inclusion characterization, including the age dating of zircon inclusions.
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The Talisman of Charlemagne: New Historical and Gemological Discoveries
Reveals new details about this historical jewel and the results of its first gemological analysis.
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Article
Montana Yogo Sapphires’ Unique Gemology
A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.
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Article
Diamond Market Forecast: Declining Credit, Soft Prices and Lab-Grown Diamonds
Despite the generally strong year for jewelry retail, the diamond industry continues to face problems with credit, spotty demand and soft prices.
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Large Pargasite Inclusion in Kashmir Sapphire
Unusually large prismatic pargasite inclusions observed in a Kashmir sapphire submitted to the Carlsbad lab for origin determination.
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Drill Hole in Heated Pink Sapphire
An unexpected manmade feature is found in a pink sapphire from Myanmar.
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Zircon Cluster in Ethiopian Sapphire
The presence of these zircon clusters might help separate Ethiopian sapphire from other basalt-related sources.
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Microscopic Observations of Blue Sapphires Treated with Heat and Pressure
A previously unreported microscopic feature could be a useful indicator for corundum treated with heat and pressure.
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