Surprisingly, diamonds do not all form in the same way, but rather they form in various environments and through varying mechanisms.

Lightbox, a De Beers company, has begun selling “white,” pink, and blue CVD laboratory-grown diamonds at a flat rate of $800 per carat.

Summarizes data collected by GIA on more than 90,000 natural diamonds in this color range and presents their gemological and spectroscopic properties.

Held October 21 and 22 at Cinema Row, the Chicago Responsible Jewelry Conference drew 200 attendees who heard industry experts discuss safe, sustainable, ethical gem production and jewelry design.

Gems & Gemology（宝石と宝石学）2018年冬号の要約。

イラスト入りの新しい宝石ガイドは、小規模の採掘職人が自ら採鉱した宝石の品質と分類について詳しく学ぶのに役立ちます。

World-class fancy colored diamonds and truly historic jewels highlighted the 2018 auctions, but total jewelry sales were down from 2017.

マリー・アントワネットの宝飾品の10点が、11月14日に行われたサザビーズのジュネーブオークションで王室のその他の宝石90点と共に驚異的な価格で落札されました。

大切な方に贈るギフトをお探しですか？12月の誕生石は、その方が12月生まれでなくても、すべての方の好み、スタイル、個性にピッタリ合ったギフトとなります。

自然は秋になると、鮮やかなパレットのように変わる木の葉の色や万華鏡のように色鮮やかな素晴らしい夕日を見せてくれます。

Over the last decade, the production methods used to create synthetic diamond melee have improved substantially, along with the quality of the specimens themselves.

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.

Part 4 of 5 in the series "Value Factors, Design, and Cut Quality of Colored Gemstones (Non-Diamond)" digs deeper into cutters’ choices and explores additional factors used in the trade to assess relative value.

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.

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.

全5部の連載記事『カラー宝石（ダイヤモンド以外）の価値要因、デザイン、カットの品質』の第1部。この記事は、カラー宝石の価格に影響を与える主な価値要因について説明します。

Presents a visual guide to the growth processes and major gemological spectroscopic features of synthetic diamonds.

A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.