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 ...

Aquamarine has been treasured through the ages, and with proper care will give its owner a lifetime of pleasure. - Courtesy Jeffrey Appling Hardness and toughness Gem and mineral hardness is measured ...

This large Australian light opal cabochon weighs 117.85 carats. Small play-of-color flashes of orange and green predominate in a pinfire pattern, with spots of a more muted blue over a grayish ...

This 122.70-carat tanzanite is in the collection of the Smithsonian National Museum of Natural History. - Chip Clark, courtesy Smithsonian Institution Tanzanite is relatively new to the colored stone ...

Found in nearly every color – most notably red, pink and blue – spinels are popular gemstones because of their abundance, moderate cost and attractiveness. Red spinel has often been mistaken for ruby.

如果要挑选一种十二月生日石，您会选择丹泉石、土耳其石，还是锆石？从丹泉石的蓝色至蓝紫色，到土耳其石浓郁的蓝色和绿色，再到锆石虹彩般的各种颜色，人人都可以挑选到适合自己的那 ...

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 ...

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.

GIAではBloomsbury（ブルームズベリー）の中心部に位置するロンドンキ ャンパスにおいて、常勤の宝石学講師を二名募集しています。 候補者は、GGの資格所持および3年間の関連業界での ...

周大福计划扩大为 T MARK 钻石提供安全的区块链数字钻石鉴定证书的范围，包括中国香港和大陆的门店。安全的 GIA 数字证书能够将钻石的历程和鉴定信息记录在同一个地方。 一年前，周大福 ...

实验室制造 CVD 钻石原石（左）、实验室制造 HPHT 钻石原石（中）以及天然钻石原石（右） 两颗刻面结晶碳的样本 — 均如水晶般清澈，在直射光下发出千变万化的光谱颜色。看上去完全相同。

GIA 远程教学包含网络学习和实习班。 网络学习是指在线进行课程学习 — 课程材料在线提供，作业和期末考试在线进行。 在实习班，您可以和讲师一起分级和鉴定宝石，获得必要的实践经验。