GIA

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响、影响钻石切工等级的因素,及克拉重量系统的起源。互动工具展示: • 钻石颜色随着GIA的 D到Z颜 …

Gems & Gemology is the award-winning quarterly journal of the Gemological Institute of America. Since 1934, G&G; has published groundbreaking research …

GIA’s 4Cs iPhone app features video and interactive tools that teach consumers about how GIA grades color, cut, clarity and carat weight. It explains …

GIA’s 4Cs app features video and interactive tools that teach consumers about how GIA grades color, cut, clarity and carat weight. It explains GIA’s D …