A formal approval process is required to acquire access to the API, which includes opening a GIA client account. Learn more about the process required to apply for the API.

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 ...

Figure 1. This 0.11 ct round brilliant grandidierite is from a new deposit near the town of Tranomaro, in southern Madagascar. Photo by Delphine Bruyère. Since its discovery, grandidierite has been ...

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.

Birthstones are a fun, popular and colorful introduction to the world of gemstones. They appeal to audiences around the world regardless of gender, age, nationality or religion. Birthstones carry ...

Observations of Oval-, Pear-, and Marquise-Shaped Diamonds: Implications for Fancy Cut Grading Presents findings from observations of oval-, pear-, and marquise-shaped diamonds, laying the groundwork ...

This course covers the skills necessary to become a CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing) technician. Skills taught include using CAD software to develop models and ...

Compare laboratory-grown diamond reports on our site to discover their differences and to find the right report for you.

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.

半透明の緑色のジェダイトのビーズが27個並んだ、Hutton-Mdivaniのジェードネックレス。2014年4月7日、香港で開催されたサザビーズのMagnificent Jewels and Jadeite Saleでビーズ1個当たり100万ドル以上に値する総額2740万ドル（28億3千万円）で落札された。 ビーズは ...

You need access to the trusted data that appears on GIA grading and analysis reports in a reliable and secure manner. Customers today demand that the information they use to inform their purchasing ...

锂紫玉晶体与刻面锂紫玉，重量从 12.47 到 19.32 克拉不等。 - Robert Weldon（罗伯特·韦尔登） 锂紫玉可以制作成各种各样的珠宝款式，以满足每一位买家的需求。 锂紫玉富有魅力，但是消费者认知度相对较低。 然而，这也可理解为在零售环节可以获得合理价格。