Orangy Pink Coated "Soft Coral"
Diagnostic Features and Heat Treatment of Kashmir Sapphires
Today, only by combining different gemological tests with years of practical experience, can a conclusive determination of the origin of a sapphire be made.
What Have Diamond Ages Taught Us?
Diamond ages offer insight into continent evolution spanning billions of years.
Suggested Reading on Rubies and Their Inclusions
Suggested Reading on Rubies and Their Inclusions
Data Supplement
Compares the image quality provided by real-time microradiographic imaging (RTX) units fitted with two different detectors: an image intensifier (II) and a flat panel detector (FPD).
Color Origin of Lavender Jadeite: An Alternative Approach
Corundum with Spinel Corona from the Tan Huong–Truc Lau Area in Northern Vietnam
Explains the reactions responsible for the formation of a well-developed reaction rim of spinel that surrounds the corundum core in some specimens from this deposit.
Natural Blue and Black Diamonds, a Byzantine Garnet Intaglio, Yogo Sapphires, and “Kasumiga Pearls”
D-Color Natural IIa Diamond with Walstromite Inclusion
Green-Blue Maxixe-Type Beryl
Nephrite Bracelet with Filled Cavity
Strong Fluorescence in B-Jade Impregnated with Wax
Merelaniite Inclusions in Tanzanite
Perettiite-(Y) and Tusionite Inclusions in Phenakite from Myanmar
Turquoise-Rock Crystal Composite
Using Conventional Equipment to Separate Natural from Synthetic Ametrine
Challenges and Opportunities
Rare Faceted Wurtzite
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