Back to gem encyclopedia

Tanzanite

Poised between lush blue, vibrant violet, and rich purple, exotic tanzanite is found in only one place on earth, near majestic Mount Kilimanjaro.

Responsive image
Unique Hues

Unique violet-to-blue hues

Responsive image
Pure Blue

Tanzanite's rich hues rival sapphire's beauty.

Responsive image
Pleochroism

Tanzanite's color blends blue hue and violet pleochroic hues.

Responsive image
Responsive image
Tanzanian Beauty

This beautiful Merelani tanzanite crystal measures 4 x 2.9 cm.

Responsive image
Pleochroic Colors

This crystal shows strong blue and brownish green pleochroic colors.

Responsive image
Matrix

This crystal shows traces of the rock where it grew on its base.

Responsive image
Tools

Research

Merelaniite whisker inclusions in tanzanite.
Merelaniite Inclusions in Tanzanite

A recently identified mineral is found, in whisker-like form, in a gem-quality tanzanite host.

Read More

Wedding couple: Groom in black tuxedo and woman in white gown hold hands and gaze at one another. California hills in the background.
Article
Love in Tucson: The ‘Stars Aligned’ for Geologist and Designer at GIA Alumni Party

They met in line to get into the GIA Alumni Association Tucson party – and changed the course of their lives forever.

Read More

Article
2017 Las Vegas Trade Spotty, Designers and Diamonds Lead

Designers respond to market trends, demand for diamonds better than expected. Plus: Holiday season diamond marketing campaign gets funding boost.

Read More

Article
2017 Vegas Outlook: Decent, But Cautious, Buying

Buyers at the 2017 JCK Show will likely stick to their open-to-buy plans, but take few chances on new lines or extra stock. Plus: An overview of retail sales, auction headlines.

Read More

Blue freeform tanzanite in ring.
Exceptional Freeform Tanzanite and Oregon Sunstone Rings

A family sources, designs, and carves gems for extraordinary jewelry and pieces.

Read More

Article
Luxury Firms Adjust to the Era of Diminished Opulence

Baselworld 2017: Luxury jewelry designers rethinking blingy, gem-laden looks for more artistic designs. Pink Star diamond sells for $71 million.

Read More

A view of downtown Hong Kong – with a freeway traveling through it.
Article
US Retailers Continue to Cite ‘Challenging’ Environment, Synthetic Melee Detected

Economists recognize that the decline in middle class purchasing power is directly affecting some consumer products – including jewelry.

Read More

A scattering of rough diamonds
Article
De Beers Optimistic as Sales Revive; Luxury Houses Remain Cautious

De Beers has largest cycle (sight) in more than two years. Luxury sales have begun to rise again after a negative year.

Read More

Rebecca Buys sits on her motorcycle.
Article
‘Hippie’ Designer-Appraiser Follows Her Heart, Re-ignites Local Alumni Chapter

Rebecca Buys, GG, with a fulfilling career as a designer and appraiser, guides GIA alumni opportunities in San Diego, California.

Read More

Jaipur, India: The Global Gem and Jewelry Power of the Pink City

Examines Jaipur’s role as a colored stone cutting and jewelry manufacturing center, with profiles of 17 companies and their factory, trading, and retail operations.

Read More