GIA 升級 iD100®寶石檢測設備以篩選粉紅色鑽石
Madagascar Sapphire: Low-Temperature Heat Treatment Experiments
Shows how the color of Madagascar sapphire is lightened with heating to relatively low temperatures below 1350°C.
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.
Mexican Opal with Large Fluid Inclusion
Although opals generally contain water in their structure, fluid inclusions large enough to be resolved with the microscope are rare; those that can be seen with the unaided eye are exceedingly rare.
The Effect of Low-Temperature Heat Treatment on Pink Sapphire
Twelve pink sapphires undergo low-temperature heat treatment and reveal a correlation with the 3232 cm-1 FTIR peak.
A Decade of Ruby from Mozambique: A Review (英語)
Reviews the mining history, market impact, and properties of ruby from northern Mozambique near Montepuez, now the world’s most productive source.
A “Hollow” Pearl Filled with Foreign Materials
Conclusively identifying the origin of a “hollow” pearl filled with foreign materials proves challenging.
Kimberlites: Earth’s Diamond Delivery System
Examines the basic characteristics of kimberlites and their relationship with diamonds.
Purple Fluorite Inclusion in Emerald from Russia
Fluorite inclusions in emeralds from various localities have been reported extensively in the literature.
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.
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.
Euhedral Phantom Sapphire in Sapphire
A phantom sapphire crystal within a host sapphire crystal was recently examined at GIA’s Carlsbad laboratory.
A Special Type of Trapiche Quartz
Three incomplete trapiche quartz make up this interesting sample.
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