Opal Gemstone | Opal Stone

◂ BACK TO GEM ENCYCLOPEDIA

Opal

Fireworks. Jellyfish. Galaxies. Lightning. Opal's shifting play of kaleidoscopic colors is unlike any other gem.

See Gem As

Tools

Research

Jewelry Television in Tucson

A look at JTV’s history, current activities, and impact on the industry.

Preview of Nature Art Science with Paula Crevoshay

Renowned designer Paula Crevoshay discusses artistic influences and her latest creations.

Chrysoprase and Prase Opal from Haneti, Central Tanzania

Commercial quantities of gem-quality chrysoprase and green prase opal (nickel-bearing chalcedony and common opal, respectively) have been recovered from altered serpentinite deposits near Haneti, Tanzania.

Winter 2011 G&G Lab Notes

This section, from the Winter 2011 issue of Gems & Gemology, is a compilation of interesting finds from GIA’s laboratories.

PreviousPage 6 of 6Next

This Month's

Featured Gems

PERIDOT

Found in lava, meteorites, and deep in the earth’s mantle, yellow-green peridot is the extreme gem.

FANCY COLOR DIAMOND

Dazzling brilliance. Captivating color. These are the planet’s most valued gems.

DIAMOND

Diamonds are among nature’s most precious and beautiful creations.

EMERALD

Emerald is the bluish green to green variety of beryl, a mineral species that includes aquamarine.

CITRINE