2018年春のオークション、慎重なスタートに向かう
世界中のバイヤーがより慎重になっているため、主要なファンシーカラーダイヤモンドや大きなカラーレスダイヤモンドが記録を更新することはあまり見られませんでした。
夢のような晶洞: ドラマチックなデザインで輝く微小結晶
晶洞ジュエリーの人気が、ここ数年で急上昇しています。有名人が身に着けてレッドカーペットを歩いたり、宝石ショーでデザイナーたちが声高に求めたりしています。
アーガイル鉱山のピンクダイヤモンドは終わりを迎えるのでしょうか?
The flow of Argyle fancy pink diamonds may end in 2020 if prices for the other stones the mine produces don’t improve. Plus: More diamond updates.
2018年: GIA同窓生が交流を深める最高の年
GIA serves alumni by continuing to share knowledge, develop and deliver education, and provide opportunity for our alumni throughout their careers.
テキサスの宝石商、約50万ドルの奨学金を寄贈し、学習の遺産を残す
CharlesとErna Leutwylerが寄贈した奨学金により、宝石・宝飾業界で将来キャリアを目指している方々が夢の実現が可能になります。
Two Natural Type IIa Diamonds with Strong Phosphorescence and Ni-Related Defects
Natural diamonds exhibit characteristics normally seen in synthetic material.
Aragonite Spheres in Ethiopian Opal
Unusual inclusions are found in an opal from Ethiopia’s Wollo Province.
Quarterly Crystal: Shattuckite in Quartz
Filled Pearl with Surface Features
Coated Beryl Imitating Emerald
Coating on a beryl demonstrates the importance of thorough examination of jewelry and gem materials.
Celebrating 50 Years of Tsavorite
An exhibit at the 2017 AGTA Tucson Gem Fair celebrates the work of Campbell Bridges.
Wollastonite Blizzard Within Glass
Beads believed to be synthetic quartz are discovered to be glass with a surprising set of inclusions.
Accurate Reporting of Key Trace Elements in Ruby and Sapphire Using Matrix-Matched Standards
Presents a group of corundum standards developed by GIA to improve the accuracy and efficiency of its laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) instruments.
New Phenomenal Feldspar from North Carolina with Iridescent Inclusions
A deposit in North Carolina yields potassium feldspar with a phenomenon similar to Australian rainbow lattice sunstone.
Remarkable Twinned Calcite Inclusion in Mogok Ruby
A clear example of calcite twinning is found in a ruby from the Mogok Stone Tract.
Complex Yellow Fluid Inclusions in Red Burmese Spinel
A unique inclusion in red spinel is indicative of a Burmese origin.
Cat’s-Eye Alexandrite with Unique Inclusion Pattern
Examination of a chatoyant alexandrite cabochon.
Two Unusual Natural Sapphires with Synthetic Ruby Overgrowth
For the first time, the Carlsbad and New York labs see natural sapphire seeds with synthetic ruby overgrowth.
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