Default on the World Record Diamond?|
March 6, 2014 | Jewish Business News
In late 2013 Sothbey’s sold a 60 carat fancy vivid pink diamond for a record price of $83 million – the highest price ever paid for a diamond of any kind. Now the buyer is unable to pay.
Related: How do diamonds form?
What is a Maar?|
March 6, 2014 | Geology.com
Maars are the second most common volcanic feature on Earth.
The largest maars are found on the Seward Peninsula of Alaska. Do you know what they are and how they form?
Geology of Diamonds|
February 18, 2014 | GeoscienceWorld.org
An interesting article on “Diamonds and the Geology of Mantle Carbon” that considers the various types of diamonds, their host rocks, inclusions, geographic distribution, environments of formation, age, trace element composition, textures, carbon/nitrogen isotopes, geobarometry, and lots more.
Tucson Gem and Mineral Show Interview|
February 13, 2014 |
The Arizona Geological Survey just published a special episode of Arizona Mining Review. Lee Allison interviews Peter Megaw, Exhibits Chair of The 60th Annual Tucson Gem and Mineral Show which begins today. At least 40 other gem, mineral, fossil and jewelry shows have been occurring in Tucson for the past few weeks.
How to Tell Diamond from CZ|
February 13, 2014 | Business Insider
A short video on Business Insider explains how jewelers can distinguish diamonds from cubic zirconia – CZ has much higher specific gravity and dispersion.
February 13, 2014 | Geology.com
Peridotite is a host rock of chromite, a source rock of diamonds, a potential sink for atmospheric carbon dioxide and the rock that makes up much of Earth’s mantle. Did you realize it was so important?
Related: Misconception: Diamonds Don’t Form From Coal
Popular for January 2013|
February 2, 2014 | Geology.com
The Polar Vortex
Hot Rock Under the Atlas Mountains
Big Rare Earth Find in North Korea?
Horizontal Well Density in the Utica Shale of Ohio
Big Blue Diamond Found in South Africa
Ice Quake in Wisconsin?
Wow! The Best Snowflake Photos
Why Was It So Cold Last Week?
Diamonds in the Afterlife?|
February 2, 2014 | National Public Radio
A few companies are producing “memorial diamonds” from the remains of cremated humans. For a few thousand dollars you can have a 1/4 carat (about 4 mm) diamond produced after your death for your heirs.
Big Blue Diamond Found in South Africa|
January 23, 2014 | Reuters
A blue diamond about the size of an acorn and weighing 29.6 carats has been discovered in South Africa by Petra Diamonds.
The Smithsonian Gem and Mineral Collection|
November 24, 2013 | Gemological Institute of America
The Gemological Institute of America has an article with five videos and a photo gallery that gives you a “behind the scenes” look at the Smithsonian Gem and Mineral Collection.
Fancy Vivid Pink Diamond Sells for $83 Million|
November 19, 2013 | Bloomberg
A fancy vivid pink diamond weighing 59.60 carats was sold last week in Geneva for $83 million. That is the highest price ever paid for any gemstone at auction.
Related: How do diamonds form?
Most Viewed News in October|
November 1, 2013 | Geology.com
Egypt Fears a Dam on the Nile in Ethiopia
235 Carat Diamond Found in Siberia
Status of Recent Geoscience Graduates
Nice Yellow Diamond Found in Arkansas
What Caused the Sudden Explosion of Animal Life 520MYA?
Walking Away from One of the World’s Largest Gold Discoveries?
Shell Walks Away from Oil Shale
Granitizers vs Magmatists
Nice Yellow Diamond Found in Arkansas|
October 22, 2013 | Yahoo News
A 14-year-old girl from Oklahoma City has unearthed a 3.85-carat diamond at Arkansas’ Crater of Diamonds State Park.
Related: United States Gemstones
Converting Methane into Diamonds?|
October 15, 2013 | National Geographic
Intense temperature, pressure and lightning storms on Saturn and Jupiter may be able to convert atmospheric methane into diamonds – producing a rain of diamonds on those planets.
235 Carat Diamond Found in Siberia|
October 10, 2013 | RIA Novosti
Alrosa, the state-controlled diamond mining company of Russia, reports that they have found a 235 carat gem-quality diamond at their Yakutia mine in Siberia. The stone is valued at $1.5 to $2 million US.
Related: Popigai: The World’s Largest Diamond Deposit?
Fluorescence in Diamond|
October 2, 2013 | Gemological Institute of America
The Gemological Institute of America has a new article titled “Fluorescence Produced by Optical Defects in Diamond“.
Diamonds from Brazil?|
September 25, 2013 | Gemological Institute of America
Few people think of Brazil as a source of diamonds, but in the 1700s the country was the world’s leading supplier of gem-quality diamonds. Production continues there today with about 25,000 carats produced per year.
Related: The only producing diamond mine in the USA.
Popular for August 2013|
September 3, 2013 | Geology.com
40 Maps that Explain the World
A Spanish Fort in the Appalachians in 1567?
12-Year-Old Finds a 5-Carat Diamond in Arkansas
Sinkhole in Western Kansas
Rare Eruption of Steamboat Geyser
Origin of the Antarctica Ice Sheet?
Frozen Landslides in Alaska
Solar Magnetic Field is about to Flip?
Flash Flooding Near Page, Arizona
12-Year-Old Finds a 5-Carat Diamond in Arkansas|
August 15, 2013 | New York Daily News
A 12-year-old from North Carolina walked into the Crater of Diamonds prospecting area and in about ten minutes found a five-carat diamond.
Related: Crater of Diamonds
Popular Stories for July 15 to July 31|
August 3, 2013 | Geology.com
Sinkhole Photos – Wow!
Debris Flow in Southern Utah
The Strangest Volcanic Landscape
Thousands of Volcanoes in Arizona?
An Embryonic Subduction Zone in the Atlantic?
The Geologist Who Discovered Canadian Diamonds
Top Diamond Producers
The Geologist Who Discovered Canadian Diamonds|
July 28, 2013 | Wired Magazine
An article in Wired Magazine (2008) has the interesting story about Chuck Fipke and his role in discovering the Lac de Gras diamond deposit in Northwest Territories, Canada.
Related: Diamond Mines in Canada
Top Diamond Producers|
July 18, 2013 | Geology.com
Botswana, Russia and Canada retained their positions as the top three gem quality diamond producers for 2012 according to production estimates from the United States Geological Survey.
Related: Diamond Mines in Canada
A New Diamond Production Leader?|
June 27, 2013 | Botswana Diamond Manufacturers Association
Russia is currently the world’s second largest producer of gem-quality diamonds, after Botswana. Alrosa, Russia’s largest diamond producer, has plans to surpass the production of DeBeers, the world’s leading diamond-producing company, by 2018. Their success may help Russia become the world’s leading diamond producing nation.
“A seven-hour flight from Moscow to the small town of Mirny, followed by another two-hour helicopter ride brought me to one of the most remote regions on earth, where many of the world’s diamonds are mined, Alrosa’s Nyurba mine in the Republic of Yakutia.” Quoted from the Botswana Diamond Manufacturers Association press release.
United States Gemstones|
June 11, 2013 | Geology.com
A diversity of gemstones are produced in the United States. However, the $11 million per year in domestic production is tiny compared to the $23.5 billion that are imported.
Fee Mining Sites
Geology.com and RockTumbler.com are
both GeoShops.com websites.
May 24, 2013 | RockTumbler.com
Lots of people enjoy going to fee mining sites where you can prospect inactive surface mines, mine tailings, soil, sediments or outcrops and keep any rocks, gems, minerals or fossils that you find. Examples include: Herkimer Diamond Mines where you can search for doubly-terminated quartz crystals, and Crater of Diamonds where you might be lucky enough to find a real diamond.