“It might be the ugliest diamond you’ll ever see, but within this brown sliver of carbon is a gem of a find for a University of Alberta scientist working to unravel an ocean-sized mystery deep beneath the Earth.” Quoted from the University of Alberta press release.
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.
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.
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?
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.
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.
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.
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.
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.
This fact sheet by the North Dakota Geological Survey describes the possibility of kimberlites in North Dakota and a 2010 exploration program conducted by Kennecott.
Welcome to Geology News!
We are constantly looking for interesting items related to geology and general science. When we find something interesting we share it here.
Bookmark this page and visit often. You can also receive our news for free by RSS feed or email. We publish updates three or four days per week.
Popular on Geology.com
Homeowners Insurance usually does not cover damage caused by floods, landslides, earthquakes and other geohazards.
Frac Sand is a high-purity silica sand used in hydraulic fracturing to enhance the flow of oil and gas from tight rock units.
Diamonds from Coal? Diamonds form under a variety of conditions that rarely involve coal as a source of carbon.
Fluorescent Minerals glow with spectacular colors when illuminated in the dark with an ultraviolet lamp.
Helium is a byproduct of the natural gas industry. Its most important use is in magnetic resonance imaging (MRI) machines.