This 146.10-carat peridot is in the collection of the Natural History Museum in London Peridot has always been associated with light. In fact, the Egyptians called it the “gem of the sun.” Some ...

Two major issues related to emerald are origin determination and the presence and quantity of fillers. An emerald’s value depends in part on the quality of the stone and treatments applied, so ...

Laser sawing of diamonds is beginning to revolutionize the diamond-cutting industry. Not only does the laser saw offer savings in time and money, but it also enables the cutting of material virtually ...

CARLSBAD, California – December 11, 2024 – Recognizing the industry’s interest in more information about the nature of fillers in emeralds, GIA will offer filler identification with its emerald ...

Diamonds have a long history as beautiful objects of desire. In the first century AD, the Roman naturalist Pliny stated: “Diamond is the most valuable, not only of precious stones, but of all things ...

业内称为帝王拓帕石的宝石拥有非常珍贵的颜色，也非常罕见。 不同颜色的拓帕石其价值要素具有微妙差异。 帝王色、蓝色和黄色需根据相应的标准进行评估。 寻找珠宝商 使用邮政编码寻找您 ...

顶级品质的月光石点缀着这枚精美的铂金镶钻吊坠。 几个世纪以来，月光石令设计师和宝石鉴赏家们心醉神迷。 - David Humphrey 友情提供 当买家选择月光石时，他们考察三个关键因素：体色 ...

12月の誕生石からどれか一つを選ぶとしたら、タンザナイト、トルコ石、ジルコンのどれをお選びになりますか？青から青みがかった紫色のタンザナイト、濃い青から緑色のトルコ石、様々 ...

As a consumer, you will regularly encounter in the marketplace gems that have been treated to change their appearance. A topic that often comes up is whether a particular gemstone is or isn’t treated.

如果处理过程没有影响坚固性的问题，那么红宝石会是一种非常坚固的宝石。 - Jan Goodman 公司友情提供 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 ...

GIA studied more than 400 important gemstones from the Gübelin Collection and is committed to sharing this repository of gemological information. This work is a valuable resource for all students, ...

本系列第 1 部分（共 5 部分）：有色宝石（非钻石）的价值要素、设计和切工品质 本系列文章最初于 2016 年发表在《GemGuide》上，研究了影响有色宝石价值的质量要素，特别强调了切工品质在 ...