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Rocks

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Hope Diamond

Testing the Hope Diamond

Scientists at the Natural History Museum search for the elusive "recipe" that endows the famed gem with its unique blue color
November 2010 | By Joseph Caputo

Hope Diamond

A New Chapter in the Hope Diamond’s History

The National Museum of Natural History’s most famous gem gets a modern update
August 18, 2009 | By Abby Callard

Bloody Lane Antietam

Civil War Geology

What underlies the Civil War’s 25 bloodiest battles? Two geologists investigate why certain terrain proved so hazardous
April 14, 2009 | By David Zax

Precious stones at Crater of Diamonds State Park in Arkansas

The Curious Case of the Arkansas Diamonds

In a state park full of amateur diamond miners, one prospector dug up a valuable stone worth thousands of dollars—or did he?
January 09, 2009 | By Brendan Borrell

industrial diamonds

Diamonds on Demand

Lab-grown gemstones are now practically indistinguishable from mined diamonds. Scientists and engineers see a world of possibilities
June 2008 | By Ulrich Boser

Crown Koh-i-noor Diamond

Gem Gawking

Where to See Famous Diamonds
June 01, 2008 | By Sarah Zielinski

the hope diamond

Glow-in-the-Dark Jewels

How the Hope Diamond's mysterious phosphorescence led to "fingerprinting" blue diamonds
January 14, 2008 | By Kenneth R. Fletcher

Lake Champlain

Paleozoic Vermont

What's the world's oldest communal ocean reef doing in the Green Mountain State?
January 2007 | By Dick Teresi

Smithsonian National Gem Collection

Diamonds Unearthed

In part two of this series, Smithsonian diamond expert Jeffrey Post, curator of the National Gem and Mineral Collection, discusses conflict diamonds, colored diamonds and synthetic gems grown in the lab
January 01, 2007 | By Cate Lineberry

Smithsonian National Gem Collection

Diamonds Unearthed

In the final installment of this three-part series, Smithsonian diamond expert Jeffrey Post, curator of the National Gem and Mineral Collection, discusses the fascinating stories behind the Smithsonian's diamond collection
January 01, 2007 | By Cate Lineberry

the hope diamond

Diamonds Unearthed

In the first installment of a multi-part series, Smithsonian diamond expert Jeffrey Post, curator of the National Gem and Mineral Collection, explains how the rare crystals form
December 2006 | By Cate Lineberry

At 23.1 carats, the gem is one of the largest Burmese rubies in the world.

Romance And The Stone

A rare Burmese ruby memorializes a philanthropic woman
February 2005 | By Owen Edwards


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