Gemological Institute of America2 天
宝石学およびジュエリー芸術コースのための奨学金
マラウイで新たにブルージルコンの産出が報告されました。研磨すれば美しい宝石となる原石を宝石取引市場に供給するでしょう。 GIA ダイヤモンド オリジン レポート: 科学に基づくトレーサビリティ 消費者は、これまで以上に持続可能かつ倫理的に調達さ ...
Gemological Institute of America2 天
アメジスト: 魅惑的な紫とスミレ
すべてのGIA拠点でご利用可能。 マラウイ産のブルージルコンが報告される マラウイで新たにブルージルコンの産出が報告されました。研磨すれば美しい宝石となる原石を宝石取引市場に供給するでしょう。 GIA ダイヤモンド オリジン レポート: 科学に ...
Gemological Institute of America1 天
A Study of the General Electric Synthetic Jadeite
The gemological properties of synthetic green and lavender jadeite, which has been manufactured by the General Electric Company on an experimental basis, are summarized. The synthetic jadeites ...
Gemological Institute of America2 天
宝石学およびジュエリー芸術コースのための奨学金
すべてのGIA拠点でご利用可能。 マラウイ産のブルージルコンが報告される マラウイで新たにブルージルコンの産出が報告されました。研磨すれば美しい宝石となる原石を宝石取引市場に供給するでしょう。 GIA ダイヤモンド オリジン レポート: 科学に ...
Gemological Institute of America11 年
Program Requirements
Online courses and Lab classes required to earn your online credential offered via the GIA Online Division are listed below. Click here to download the requirements ...
Gemological Institute of America11 年
Emerald Quality Factors
This 5.30-carat emerald from Brazil has a slightly bluish green color. Courtesy John Parrish, courtesy African, Brazilian, Colombian Gems Incorporated. Emerald has many special qualities, but colored ...
Gemological Institute of America11 年
Diamond Description
However gem quality diamonds are fashioned from the original crystal shape they possess a combination of brightness, sparkle, fire, and sense of purity not matched by other gems. - Jeff Scovil, ...
Gemological Institute of America6 年
Career Preparation
GIA is more than a place to grow academically. You’ll enjoy a professional affiliation with the institute throughout your career. To help you succeed, GIA staff members provide career advice and ...
Gemological Institute of America11 年
Diamond History and Lore
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 ...
Gemological Institute of America8 年
Sapphire Quality Factors
This sapphire from Kashmir has an intense velvety blue color. – Photo: Robert Weldon/GIA. Sapphire is one of the Big three of jewelry colored gemstones—the other two are ruby and emerald. A durable ...
Gemological Institute of America9 年
January Birthstone
Those born in January are lucky to have the beautiful and diverse garnet as their birthstone. Garnets are commonly red but also come in an extraordinary range of beautiful colors, including orange, ...
Gemological Institute of America11 年
Jadeite Jade Quality Factors
Jadeite comes in a wide range of colors. The most valuable is an intense green called Imperial. - Courtesy Mason-Kay Fine Jade Jewelry To understand the value of jade, you have to look beyond its ...