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Diamond

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

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A large piece of rough, left, with a portion cut out of it, and six cut and polished diamonds produced from the cut out piece of rough.

Article

Chipping Away at 1,109 ct Lesedi La Rona

Russell Shor

November 13, 2018

Graff reveals the first polished diamonds produced from the Lesedi La Rona, one of the largest pieces of rough ever mined. Plus, other market news.

A rectangle-shaped gold box, decorated with filigree, granulation and gems.

Article

Metalwork Takes a Bow: Techniques that Enhance Gemstone Jewelry

Sharon Bohannon

November 9, 2018

This collection of jewelry images illustrates how metalwork techniques showcase gemstone and jewelry designs.

Three loops of diamond ribbons form a bow around a ruby framed by more diamonds.

Article

National Retail Federation Predicts a Cheery Holiday

Russell Shor

October 22, 2018

The building blocks are in place for a strong 2018 U.S. holiday season. Plus, diamond market updates and upcoming auctions.

Crowds of people on the trade show floor.

Article

Typhoon, Trade Wars and Currency Lows Dampen Hong Kong Shows

Russell Shor

September 24, 2018

Business at the September Hong Kong Gem and Jewellery Shows was spotty, despite a strong world economy. Buyers left early to avoid Typhoon Mangkhut.

$Walstromite inclusion with fan-shaped black fractures.$

D-Color Natural IIa Diamond with Walstromite Inclusion

Ying Ma, Huihuang Li, Xiaoxia Zhu, Ting Ding, Taijin Lu, and Zhili Qiu

August 9, 2018

A diamond is proven to have a superdeep origin through an inclusion of CaSiO₃-walstromite.

Recently discovered and legendary diamonds in the blue/gray/violet color range

Natural-Color Blue, Gray, and Violet Diamonds: Allure of the Deep

Sally Eaton-Magaña, Christopher M. Breeding, and James E. Shigley

August 6, 2018

Summarizes data collected on more than 15,000 natural blue/gray/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this color range.

Fancy Dark brown to Fancy black Marange diamonds

Black Diamonds from Marange (Zimbabwe): A Result of Natural Irradiation and Graphite Inclusions

Karen V. Smit, Elina Myagkaya, Stephanie Persaud, and Wuyi Wang

August 6, 2018

Characterizes a suite of 40 natural brown to black diamonds from this deposit so that they can be distinguished from suspected treated black diamonds.

Natural-Color Blue, Gray, and Violet Diamonds: Allure of the Deep

Sally Eaton-Magaña, Christopher M. Breeding, and James E. Shigley

August 6, 2018

Summarizes data collected on more than 15,000 natural blue/gray/violet diamonds examined by GIA during the last decade and examines the mechanisms that produce this color range.

A pile of rough diamonds of various colors.

Article

Robust Demand Brings Increased Rough Diamond Sales

Russell Shor

July 23, 2018

Demand for diamonds has been good so far this year. Rough sales have increased and large diamonds are being mined. Plus: Online sales tax changes.

A large blue pear shaped diamond hangs from a colorless and pink diamond.

Article

Rockefeller and Fancy Blues Highlight Spring 2018 Auctions

Russell Shor

July 20, 2018

Rockefeller jewels and fancy blue diamonds are the stars of the spring 2018 auction season.

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

Citrine is the transparent, pale yellow to brownish orange variety of quartz.

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Diamond

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Reviewed

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Gemstones

Gemstones

Featured Gems

Peridot

Fancy Color Diamond

Diamond

Emerald

Citrine

Diamond

Research

Reviewed

Topics

Topics

Gemstones

Gemstones

Featured Gems

Peridot

Fancy Color Diamond

Diamond

Emerald

Citrine

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