Diamond is available in a range of sizes and qualities to fit every consumer's tastes. One of the first things most people learn about diamonds is that not all diamonds are created equal. In fact, ...

すべてのGIA拠点でご利用可能。 GIA ダイヤモンド オリジン レポート: 科学に基づくトレーサビリティ 消費者は、これまで以上に持続可能かつ倫理的に調達された製品に対する意識を高めています。 GIA ダイヤモンド オリジン レポートは、科学的評価を使用 ...

Emeralds set in jewelry have lasted for centuries. With the proper care, the emeralds in today’s jewelry will do the same. Courtesy Color Masters. Hardness and toughness Gem and mineral hardness is ...

Kunzite’s beauty is apparent in both its natural crystal and faceted forms. - Robert Weldon Kunzite is the light pink to violetish purple variety of the mineral spodumene. It’s found in Afghanistan, ...

Figure 1. These two musgravites (0.11 and 0.24 ct) are reportedly from Myanmar. Photo by Brad Payne. Two small, near-colorless stones reportedly from Myanmar (0.11 and 0.24 ct; figure 1) were recently ...

If you were born in the month of June, you are lucky enough to have three birthstones to call your own. June is one of only three months (the others are August and December) that has three birthstones ...

However gem quality diamonds are fashioned from the original crystal shape they possess a combination of brightness, sparkle, fire, and sense of purity not matched by other gems. - Jeff Scovil, ...

The 75.47-carat Hooker Emerald was worn by Ottoman Sultan Abdul Hamid II, the last sultan of the Ottoman Empire. Photo by Chip Clark, courtesy Smithsonian Institution, National Museum of Natural ...

While requiring care to avoid damage, moonstone lends an almost magical sheen to jewelry. - Courtesy Richard Krementz Gemstones Hardness and toughness Gem and mineral hardness is measured on the Mohs ...

To address concerns about laboratory-grown and treated diamonds being mixed into parcels of melee, GIA has developed an automated system to analyze and sort melee-size diamonds quickly and accurately.

Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the leading ...

提到摩根石的名称，就立即令人联想到美丽淡雅的粉红色、紫粉红色和橙粉红色。 - Robert Weldon（罗伯特·韦尔登），Mayer & Watt, Maysville 友情提供，肯塔基州 摩根石作为一种颜色柔和淡雅的宝石而闻名，呈现柔和的粉红色、紫粉红色和橙粉红色。 虽然摩根石通常 ...