GIA

This app gives access to GIA certificate reports, and to the story behind a diamond. With photos and

Gems & Gemology is the award-winning quarterly journal of the Gemological Institute of America. Sinc

GIA’s 4Cs iPhone/iPad app features video and interactive tools that teach consumers about how GIA gr

GIA’s 4Cs iPad app features video and interactive tools that teach consumers about how GIA grades co

GIA 4C应用程序利用视频和互动工具向消费者演示GIA是如何对钻石的颜色、切工、净度和克拉重量进行鉴定的。此应用程序解释了GIA的D到Z颜色等级及其对钻石价值的影响、GIA净度等级及其对钻石价值的影

This app gives access to GIA certificate reports, and to the story behind a diamond. With photos and

This app provides information about the provenance of a diamond, with additional information about m