Explores the geology, production, and yield of the world’s most commercially important ruby deposit.

An introduction to Moroccan amethyst, which features distinctive color zoning and inclusions.

Guided by their cultural heritage and powered by a rapidly growing domestic consumer market, Chinese designers are exerting a powerful influence on the global stage.

Features a foldout chart containing representative visible spectra and photos of the major color categories of diamond.

A discussion of the current demand for tsavorite and spinel in today’s market.

An up-close look at the cultured pearl’s role in the gem and jewelry industry.

The New York lab investigates the use of the shells of Tridacna species as imitation pearls.

A uniquely carved tourmaline suite on display in Tucson.

Rare material seen at the GJX show in February 2015.

Exceptional innovations using gem and mineral rough at Tucson’s GJX show.

Exceptional stones are recirculated and new production is showcased at the AGTA show in Tucson.

Prismatic blue and colorless dumortierite inclusions in rock crystal quartz are examined for the first time in the Carlsbad lab.

Unique carvings in gems are displayed at GJX in Tucson.

Striking Tanzanian garnets showing color shifting at the Riverpark Inn (Pueblo) show in Tucson.

Color and size make a statement at this booth in Tucson.

Emerald from the Belmont and Montebello mines of Minas Gerais, Brazil seen at the GJX show in Tucson.

At AGTA, exquisite jewelry pieces inspired by natural scenes were on view.

A gemological examination of chrysocolla in quartz from Tucson’s AGTA show.

A purple non-nacreous specimen is revealed to be a natural northern quahog pearl.

A Fancy black round brilliant diamond has an inclusion that is revealed to be a natural diamond crystal.