Natural-Color Blue, Gray, and Violet Diamonds: Allure of the Deep
Summarizes data collected on more than 15,000 natural blue/gray/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this color range.
An Early Byzantine Engraved Almandine from the Garibpet Deposit, Telangana State, India: Evidence for Garnet Trade Along the Ancient Maritime Silk Road
Analyzes the chemical composition and inclusion characteristics of this ancient artifact.
蓝色钻石来自哪里？
GIA 奖学金帮助设计师建立专业技术能力、创造力
JDT program gives designer the skills and techniques – and freedom – to create the designs that move past the trends.
Book Review: Women Jewellery Designers
Review of Women Jewellery Designers by Juliet Weir-de La Rochefoucauld.
Characterization of Blue Sapphires from the Mogok Stone Tract, Mandalay Region, Burma (Myanmar)
The Mogok Stone Tract of central Myanmar (Burma) is one of the world’s most famed sources of colored stones, particularly ruby, sapphire, and spinel.
Natural Blister From Entombment Of A Pearlfish Within A Pinctada Maxima Shell
Fracture-Filled Diamond with "Rainbow" Flash Effect
The material used to fill a large fracture in a diamond yields an unexpected iridescence under two different illuminations.
Colombian Emerald Industry: The New Generation
Cultured Pearl Update
Dendritic Inclusions in Cambodian Sapphire
A sapphire from Pailin, Cambodia, hosts inclusions that are unusual for this material.
Iridescence in Metamorphic “Rainbow” Hematite
Analyzes the substructures that cause the intense iridescence observed in “rainbow” hematite from Minas Gerais, Brazil.
Update on the Green Dragon Demantoid Mine in Namibia
Unheated and Unusual Colors
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