カラーストーンのカットの品質：考慮するべき点
Part 5 of 5 in the series “Value Factors, Design, and Cut Quality of Colored Gemstones (Non-Diamond)” explores craftsmanship’s bearing on cut quality.
宝石のカッティングスタイル - 定義
Part 2 of 5 in the series “Value Factors, Design, and Cut Quality of Colored Gemstones (Non-Diamond)” establishes a common language for discussing cutting styles, with a focus on basic faceting styles, and offers a short discussion on cabochons and beads.
カラーストーンの暗さと明るさ
Part 3 of 5 in the series “Value Factors, Design, and Cut Quality of Colored Gemstones (Non-Diamond)” examines how cutting decisions can have a profound effect on a gemstone’s color quality.
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.
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.
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.
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.
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.
Cultured Pearls from Lake Kasumigaura: Production and Gemological Characteristics
Examines Japanese “Kasumiga” freshwater cultured pearls, which grow in a variety of colors.
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.
The Challenges of Cutting a Large Gem Opal Rough
A first-person account of cutting a 3,019 ct piece of white opal to create a 1,040 ct gem with play-of-color across the surface.
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.
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。
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