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A ruby and diamond choker. The center section is made of six strands of red pearls, framed by rubies and diamonds.
Article
Mughal Jewels Auction: Al-Thani Collection Raises $109 Million

Collectors from around the world descended on Christies’ Maharajas & Mughal Magnificence auction of the jewels from the Al-Thani Collection on June 19.

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Article
Diamond Fun Facts

Learn more about one of the Earth’s most fascinating creations, including some that became the most famous.

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Bicolored Quartz
The Anahí Ametrine Mine, Bolivia

The Anahí mine, Bolivia, has produced large amounts of amethyst, citrine, and amethyst-citrine for the gem market.

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Aquamarine from San Luis Potosí State in northern Mexico
Aquamarine from a New Primary Deposit in Mexico

Examination of aquamarine samples from a new primary deposit in San Luis Potosí, northern Mexico.

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Map of main aquamarine deposits of northern Pakistan.
Aquamarine from Pakistan

A gemological investigation of the aquamarine that has emerged from northern Pakistan in recent years.

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GIA field expedition team in Ethiopia
Land of Origins: A Gemological Expedition to Ethiopia

Documents a visit to the sapphire, opal, and emerald mining and trading areas of Ethiopia.

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Article
Emeralds: Colombia’s Buried Treasure

Colombia is home to a rainbow of gems, but emeralds – and the tales of lore that surround them – are the country’s most well-known treasures.

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Multi-colored gems are superimposed on an image of glacier peaks.
Article
Gems and Minerals from the Subarctic

Circumnavigate the boreal reaches of the globe to explore gems from polar regions.

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Rubies and Sapphires from Winza, Central Tanzania

Since late 2007, rubies and sapphires have been mined by hand methods from both eluvial and primary deposits at Winza in central Tanzania.

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An early black and white photo that shows deep trenches dug into the ground in the search for diamonds. Ladders and ropes help the miners excavate and traverse the mine.
Article
Historical Reading: The Diamond Fields of South Africa: Part 1 (1868-1893)

The discovery of diamonds in South Africa in early 1867 marked the start of an historic period of diamond exploration.

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