Learn about the factors that make morganite so desirable.

This silicate of aluminum, iron, and magnesium has two distinctive features—a beautiful, violetish blue through slightly violetish blue hue derived from iron and a striking, eye-visible pleochroism.

Iolite has a long history of use as an adornment and possibly as a navigation tool.

Learn about the factors that make iolite so desirable.

Modern gemologists use the word “jade” as a generic term for both nephrite and jadeite. These minerals have been linked throughout history.

The Black Prince’s Ruby. The Timur Ruby. For centuries, spinel, the great imposter, masqueraded as ruby in Europe’s crown jewels

The spinel used in jewelry is a small part of a group of minerals that share the same crystal structure. Not all of them form transparent crystals suitable for jewelry use, however. Spinel offers a range of hues, from orange to intense “stoplight” red, vibrant pink, and all shades of purple, blue, and violet through bluish green.

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

Learn about the factors that make rose quartz so desirable.

A review of Diamonds: An Early History of the King of Gems by Jack Ogden.

Review of Figures & Faces: The Art of Jewelry by Patrick Mauriès and Évelyne Possémé

Review of Geology: A Very Short Introduction by Jan Zalasiewicz.

Review of Masterpieces in Miniature: Engraved Gems from Prehistory to the Present by John Boardman and Claudia Wagner.

Review of Symphony of Jewels: Anna Hu Opus 2 by Janet Zapata with Sarah Davis.

了解人们如此热衷彩钻的原因。

Learn about the factors that make lapis lazuli so desirable.

This document provides access to the 2013 G&G Challenge.

This document provides the publication information for Gems & Gemology