Two Natural “Horse Conch” Pearls
Rare pearls, along with their shell, are studied in the Hong Kong lab.
Gemstone Guidebook Project
A project coordinated by GIA and the NGO Pact provides a valuable educational tool to women miners in Tanzania.
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.
Natural Blue and Black Diamonds, a Byzantine Garnet Intaglio, Yogo Sapphires, and “Kasumiga Pearls”
Cultured Pearls from Lake Kasumigaura: Production and Gemological Characteristics
Examines Japanese “Kasumiga” freshwater cultured pearls, which grow in a variety of colors.
Black Diamonds from Marange (Zimbabwe): A Result of Natural Irradiation and Graphite Inclusions
Characterizes a suite of 40 natural brown to black diamonds from this deposit so that they can be distinguished from suspected treated black diamonds.
合成ダイヤモンドの特徴 (英語)
Presents a visual guide to the growth processes and major gemological spectroscopic features of synthetic diamonds.
モンタナ州のYogo（ヨゴ）渓谷から産出されたサファイアの宝石学的な特徴 (英語)
A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.
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.
Diamonds Help Solve the Enigma of Earth’s Deep Water
The first installment of G&G’s newest section explores how natural diamonds shed light on the mystery of water found in Earth’s deep mantle.
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.
ブルーダイヤモンドはどこで誕生するのか？
Book Review: Women Jewellery Designers
Juliet Weir-de La Rochefoucauld著『Women Jewellery Designers（女性のジュエリーデザイナー）』のレビュー
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.
Chow Tai Fook（周大福）とGIA、ブロックチェーンを介して消費者にダイヤモンドグレーディングレポートを提供する
煌びやかな庭園: 母なる自然がもたらすデザインのパラダイス
庭園で見かけられる可愛らしい生き物や花は、ビクトリア朝、アールヌーボーや現代のジュエリーデザインを美しく表現するのに好まれているモチーフです。
地質学者の最新の使命: カラー宝石への愛を分かち合う
アフリカ生まれのカラーストーン専門家がアメリカを訪れた後、最愛の人と巡り合い、GGを取得し、新しいキャリアをスタートして人生が一変します。
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