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Topaz

Honey yellow. Fiery orange. Cyclamen pink. Icy blue. In warm or cool tones, topaz is a lustrous and brilliant gem.

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Reddish Pleochroism

Topaz’s reddish pleochroic color often appears at the ends of cut gems.

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Prized Color

Rich reddish orange is one of this gem's most coveted colors.

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Long Oval

Because topaz crystals are typically elongated, polished gems are often cut long.

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Columnar Crystal

This topaz crystal has a columnar prism with a “chisel-like” termination.

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Basal Cleavage

Parallel to the base of the crystal are weaker bonds between the atoms.

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Imperial

The color the trade calls imperial topaz is highly prized and very rare.

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Tools

Research

Article
Observations on the Heat Treatment of Basalt-Related Blue Sapphires

Researchers from GIA’s Bangkok laboratory seek to identify low-temperature heat treatment in basalt-related blue sapphires.

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A man and woman shake hands during a career fair event. In the background is a GIA poster.
Article
Adapting to Changing Workplaces

GIA Career Service advisors offer tips on how to navigate the changing workforce and consumer attitudes for success in the gem and jewelry industry.

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Man sits next to microscope.
Article
Tucson Visit Spurs Geology Professor, Publisher to Head Back to School

Geologist, publisher earns his GG so he can share more information on gem materials with visitors to Geology.com, his Earth Science website.

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Woman holds multiple strands of black cultured pearls.
Article
‘Pearl Goddess’ Pours Experience, Support into GIA Alumni Association

Betty Sue King shares her expertise at chapter meetings, on pearl trips and with donations to the Tucson auctions – all in support of the GIA alumni.

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Woman in green and white top and a white apron shows off a mollusk with a pearl in it.
Article
Jeweler’s Goal: Unite Gem, Jewelry Industry in One of Mexico’s Largest Cities

Alumni chapter leader wants to help develop Mexico’s third-most populous city into a thriving jewelry design and manufacturing hub.

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A bright orange, multi-faceted gem.
Article
Fall for Autumn Gems

Nature gives us a brilliant palette of color-changing leaves and a spectacular kaleidoscope of colorful sunsets during the fall season.

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Topaz from Pakistan with microlite inclusions.
Microlite Crystals in Topaz from Pakistan

Aesthetically pleasing inclusions are found in topaz from Pakistan’s Shigar Valley.

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Close-up shot of 18K yellow gold, emerald, enamel and diamond lariet suite, inclusing ring, lariet, pendant and earrings.
Article
GIA Scholarship Helps Designer Build Technical Skills, Creativity

JDT program gives designer the skills and techniques – and freedom – to create the designs that move past the trends.

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Red beryl from Utah found on the secondary market
Finds from the Secondary Market

Dave Bindra shows some noteworthy pieces he obtained on the secondary market and shares his thoughts on the state of the colored stones market.

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Colored stone pendants designed by Erica Courtney
Designs from Erica Courtney

Award-winning jewelry designer Erica Courtney presents four of her creations.

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