GIA, whose expertise spans gemological research, laboratory services and education, is introducing the GIA Jade Report, featuring additional gemological information and a sleek, user-friendly layout to enhance the overall report experience for both industry professionals and consumers.

ガーネットは、近縁種である鉱物が集まったグループで、ほとんどすべての色が揃う宝石です。

An exploration of the distinction between jadeite and omphacite, plus GIA's current policy concerning the definition of these stones.

World-renowned gem identification expert who guided GIA's lab services to the forefront of gemological research.

Learn about the factors that make tourmaline so desirable.

Thousands of years ago, red garnet necklaces adorned the necks of Egypt’s pharaohs, and were entombed with their mummified corpses as prized possessions for the afterlife.

Ruby is the most valuable variety of the corundum mineral species, which also includes sapphire

Learn about garnet's durability and how to care for your garnet jewelry.

Learn about Turquoise's durability and how to care for your Turquoise jewelry.

This document provides the publication information for Gems & Gemology

The name ruby comes from the Latin word ruber, which means “red.” The glowing red of ruby suggested an inextinguishable flame burning in the stone...