GIA 升級 iD100®寶石檢測設備以篩選粉紅色鑽石
在中國深圳提供 GIA 教育課程
CARLSBAD, Calif. – Aug. 19, 2019 – Aspiring gem and jewelry professionals in Shenzhen, China will now have direct access to GIA education programs through Peking University Resource College.
Pyrope-Almandine Garnet in Sapphire Host
The Bangkok laboratory recently identified a pyrope-almandine garnet in a sapphire host.
Dive Into Summer: Mozambique Ruby, Madagascar Sapphire, and Black Nephrite from China, Plus an Opal Inclusions Chart
A Special Type of Trapiche Quartz
Three incomplete trapiche quartz make up this interesting sample.
Gemological and Chemical Characteristics of Natural Freshwater Pearls from the Mississippi River System
Tagua Nut as a Sustainable Botanical Alternative for Ivory
Jewelry designer Alexandra Mor uses sustainable alternatives for elephant ivory.
Gem Art of the Taj Mahal, Fancy White and Black Diamonds, and Unique Inclusions in Thai Corundum
Evidence of Rotation in Flame-Structure Pearls from Bivalves of the Tridacnidae Family
A study of these pearls to characterize their distinctive flame structure and examine the possibility of rotation during their formation or growth.
Black Nephrite Jade from Guangxi, Southern China
Characterizes black nephrite from a deposit in the Guangxi region that appears to be part of a large-scale jade formation belt in southern China.
Purple Fluorite Inclusion in Emerald from Russia
Fluorite inclusions in emeralds from various localities have been reported extensively in the literature.
A “Hollow” Pearl Filled with Foreign Materials
Conclusively identifying the origin of a “hollow” pearl filled with foreign materials proves challenging.
Helical Inclusion in Colombian Emerald
A 7.54 ct natural emerald containing a 3D helical inclusion is examined by the Tokyo laboratory.
Rough Diamond Crystal with an Unusual Coating of Fake Green “Radiation Stains”
The interior structures of pearls are always of interest, as they are never revealed until the analysis begins.
Inclusion-Rich Black Topaz from the Thomas Mountains, Utah
Topaz is an important gemstone that occurs in various colors.
Kimberlites: Earth’s Diamond Delivery System
Examines the basic characteristics of kimberlites and their relationship with diamonds.
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