Review of Gem Testing Techniques by Alan Hodgkinson.

通过有效利用 GIA 博物馆提供的碧玺以及鉴定所的技术，GIA 的博物馆和鉴定所与 JDT 班的学生在设计项目展开合作。

初步检测表明，可能来自马达加斯加的 34 颗星形红宝石的净度因填充了铅玻璃而有所提升。 此外，这些红宝石还与来自其他矿床的星形红宝石进行了对比。

钻石净度是指其无内含物和表面特征的程度。

大多数宝石级钻石的成色等级取决于它的无色程度。

许多人会把钻石切工等同于钻石的形状。实际上钻石切工等级取决于其刻面与光线的相互作用结果。

检验七颗呈现诱人粉红色的 CVD 合成钻石。

了解人们如此热衷于拓帕石的原因。

了解人们如此热衷尖晶石的原因。

Learn about the factors that make alexandrite so desirable.

Aquamarine is the green-blue to blue variety of the mineral beryl.

海蓝宝石因海水而得名，其清新水润的色调如同畅游在清凉的泳池中。

Learn about the factors that make citrine so desirable.

Learn about emerald's durability and how to care for your emerald jewelry.

Learn about garnet's durability and how to care for your garnet jewelry.

Thousands of years ago, red garnet necklaces adorned the necks of Egypt’s pharaohs, and were entombed with their mummified corpses as prized possessions for the afterlife.

Emerald’s lush green has soothed souls and excited imaginations since antiquity.