需小心护理以避免损坏。月光石是拥有近乎神奇光泽的珠宝。 - Richard Krementz Gemstones 友情提供 硬度和韧度 莫氏硬度用以衡量宝石和矿物的硬度。 这些数字基于一种矿物可被其他物品划伤的相对 ...

With 65,000 volumes, 230,000 images, 2200 videos, and 1200 periodicals, the Richard T. Liddicoat Gemological Library & Information Center and Cartier Rare Book Repository & Archive is the largest, ...

PDF versions of the GIA Laboratory-Grown Diamond Reports are available on Report Check. Look for an icon in the upper right hand corner. Once downloaded, the report can be printed for your records.

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 ...

Cultured pearls come in different sizes, shapes, and colors. Perhaps the best-loved gems of all time, pearls—both natural and modern cultured pearls—occur in a wide variety of colors. The most ...

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.

For each of the GIA pearl services, multiple loose pearls (quantity limits vary by report type) and single jewelry items, including those that contain separate pieces (e.g. earrings, cufflinks, tuxedo ...

The Graduate Gemologist ® diploma program taken via Distance Education is a combination of five online eLearning courses and three hands-on lab classes. Lab classes are offered at GIA campuses ...

Figure 1. This 85 ct quartz crystal contains bright reddish rutile needles. Photo by Robert Weldon; courtesy of Rare Earth Mining Co. Rutilated quartz has come into its own as a mainstream gem ...

美国宝石研究院 (GIA) 在线教育包含在线课程和实习班，可助您获得 GIA 课程文凭。完成三门专业发展课程后，即可获得应用珠宝家 (Applied Jewelry Professional) 文凭。您可通过在线课程灵活学习 ...

锆石的典型绿蓝色一直被称为锆石蓝。 - John Dyer & Co.的 Lydia Dyer 友情提供 锆石能够绽放多种美丽的色彩，令人遗憾的是，这种宝石却不为珠宝买家所熟知。 这些色彩包括肉桂色、雪利酒色 ...

Figure 1. Pinctada maxima shells: gold-lipped (left) and silver-lipped (right). Their names are derived from the color of their nacreous shells. Photo by Nuttapol Kitdee. Real-time microradiography ...