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Geology News
Gemstones Current Events

100 Carat Vivid Yellow Diamond to be Sold
April 24, 2014 | The Business Standard

The Graff Vivid Yellow, a fancy diamond of just over 100 carats is going to be auctioned in Geneva. It is expected to sell for about $25 million.

$20,000 for a Canary Diamond Found in Arkansas?
April 17, 2014 | Weather Channel

Tana Clymer, a 14-year-old from Oklahoma City found a nice canary-colored diamond at the Crater of Diamonds State Park in Arkansas last fall. She recently sold it for $20,000.

Related: Diamond Mines in the United States.

What is Peanut Wood?
April 16, 2014 |

This material is a petrified wood from Australia but it has nothing to do with peanuts. Most people are amazed when they learn how it forms.

Spring Mineral Shows
April 1, 2014 | has a large list of mineral shows that will take place this spring. The list is updated frequently so book mark it and check it occasionally. There is probably a mineral show near you.

If you live on the east coast one to check out is the New York / New Jersey Mineral, Fossil, Gem and Jewelry Show on April 11-13 at the New Jersey Convention and Exposition Center. There will be 340 dealers.

Another is the Fine Mineral Show, April 25-27 at Embassy Suites in Houston.

The Bunder Diamond Project
March 13, 2014 | Rio Tinto Diamonds

The opening of new diamond mines are rare events anywhere in the world and Rio Tinto’s Bunder Project is the first new diamond mine to open in India in over 40 years.

Related: How Do Diamonds Form?

What is Sunstone?
March 9, 2014 |

What happens when minute flakes of copper in a common orientation are scattered through a piece of transparent feldspar?

Organic Gems
March 6, 2014 |

Although most gemstones are mineral materials, a number of organic materials and fossilized organisms are considered to be gemstones. The most common of these are pearl, bone, amber, coral, ivory, petrified wood, fossil coral, dinosaur bone and more.

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?

February 27, 2014 |

Chrysoberyl is an extreme gem. At 8.5 on the Mohs Scale it is the third hardest gem mineral. At 3.7 to 3.8 it has a very high specific gravity for a non-metallic mineral. It is the gem with the finest cat’s eye. And, some specimens change color depending upon the type of incident light.

Geology of Diamonds
February 18, 2014 |

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.

Fire Opal
February 2, 2014 |

“Fire Opal” is a term used for colorful, transparent to translucent opal with a background color that is a fire-like hue of yellow to orange to red. It might or might not exhibit “play-of-color”.

Related: Photos of Many Types of Opal

Popular for January 2013
February 2, 2014 |

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.

Most Popular Items for December
January 2, 2014 |

The Saturn Hexagon?

The Utah Supervolcano

What is Ammolite?

Landslide on an Incredible Scale

Failure of the Midcontinent Rift

Zoom in on the San Andreas Fault

Price of Gold Falling

Size of the Yellowstone Magma Chamber Severely Underestimated?

Salaries and Employment of Recent Geoscience Graduates

The Largest Recorded Fault Slip

How Do They Steer the Horizontal Drill?

What is Ammolite?
December 17, 2013 |

Ammolite is a trade name given to a thin iridescent aragonite shell material that is found on two species of extinct ammonite fossils (Placenticeras meeki and Placenticeras intercalare). Gem-quality Ammolite produces a spectacular display of iridescent color when it is observed in reflected light. The colors of an individual stone can run the full range of the visible spectrum or be limited to just one or two colors. The color display can rival fine opal and labradorite in its intensity and beauty.

December 15, 2013 |

Turquoise is a blue to blue-green gem material that has been used by people worldwide for over 6000 years.

2014 Mineral Shows
December 12, 2013 | has a comprehensive list of mineral shows for 2014. There are probably at least a couple of shows scheduled near you!

Coloured Gemstone Deposits in the Yukon
December 10, 2013 | Yukon Geological Survey

Nice publications on the geology of gemstones are rare. Here is a nice open file report from the Yukon Geological Survey.

It is Open File Report 2004-10, “EXPLORATION CRITERIA FOR Coloured Gemstone Deposits in the Yukon” by Lori Walton.

Anthill Garnet?
December 3, 2013 |

They are called “anthill garnets” because they are found on and around the margins of anthills. The ants encounter the garnets while excavating their underground passages, haul them to the surface and discard them.

Related: What is Garnet?

The Demand for Emeralds is Rising
December 3, 2013 | CNN

“The price for high-quality emeralds has increased by a factor of 10 since 2009, and the price of Colombian emeralds is set to increase by at least 25% this year alone.” Quoted from the CNN article.

Most Popular Items for November
December 2, 2013 |

The World’s Largest Emerald Mine

What is Iris Agate?

New Volcanic Island Southeast of Japan

The Enormous Volcanic Eruption that Historians Never Recorded

A Super River from the Southwestern United States to the Labrador Sea?

Typhoon Haiyan Images

Comet Ison is Visible to the Naked Eye

New Super Predator Dinosaur

Rock, Mineral, Gem and Fossil Kits
December 2, 2013 | Store

The Store has a nice selection of rock, mineral, gemstone and fossil kits for personal or classroom use.

What is Iris Agate?
November 27, 2013 |

““Iris Agate” is a name used for a finely-banded agate that produces a spectacular display of color when it is cut properly and illuminated from a direction that sends light through its very thin bands.”

Bill Magee the Gem Miner
November 24, 2013 |

An interesting video about Bill Magee, a gem miner who lived and found lots of gems in southern California. (His big find – about 1 1/2 tons of morganite crystals – is at about 22:30.)

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?

The Worlds Largest Emerald Mine
November 14, 2013 | Gemfields Plc on YouTube

This video shows a few activities at Gemfields’s Kagem Emerald Mine in Zambia.

Most Viewed News in October
November 1, 2013 |

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

What is Petrified Wood?
October 27, 2013 |

Petrified Wood is a fossil that forms when dissolved materials in groundwater precipitate and petrify woody material.

October 25, 2013 |

Labradorite is a feldspar mineral of the plagioclase series. Some specimens exhibit a schiller effect, which is a strong play of iridescent blue, green, red, orange, and yellow colors. Labradorite is so well known for these spectacular displays of color that the phenomenon is known as “labradorescence.”

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

Turquoise the Gem Mineral
October 22, 2013 |

Turquoise is a blue to blue-green gem material that has been used to make gemstones and art objects by people worldwide for over 6000 years.

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.

October 13, 2013 |

Ametrine, a combination of amethyst and citrine is a bicolor quartz and a gemstone of growing popularity.

It is produced commercially from just one mine in the world, located in eastern Bolivia.

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.

Sapphire Mining in Madagascar
September 23, 2013 | Gemological Institute of America

The Gemological Institute of America has an article about mining sapphires from the Ilakaka-Sakaraha deposit – the world’s largest sapphire producer.

Related: Corundum – The Mineral of Sapphire and Ruby

Gem Mining in Cambodia
September 19, 2013 | Gemological Institute of America

The Gemological Institute of America has two short videos that show mining for sapphire, ruby and other gems in Cambodia.

Ancient Chinese Jade
September 8, 2013 | National Geographic

National Geographic has a video about how Chinese artists made large jade disks over about 5000 years ago. The disks that they made are remarkable considering how difficult a material jade is to work.

Related: What is Jade?

Synthetic Sapphire as an Industrial Material
August 30, 2013 | Gemological Institute of America

Did you know that the barcode scanner used in many grocery store checkout lanes has a window made of synthetic sapphire? That is one of many applications of synthetic sapphire as an industrial material.

Related: Corundum – The mineral of rubies and sapphires.

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

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 |

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

Most Popular: July 1 to July 15
July 17, 2013 |


Caves Discovered by Construction Projects

100 Million Barrel Discovery in the Gulf?

Six Planets – Three in Habitable Zone

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Sky Islands

Yosemite Falls

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.

June 25, 2013 |

Fluorite is an important industrial mineral used in a variety of chemical, ceramic and metallurgical processes. Although the United States has some fluorite deposits, most of the mineral consumed here is imported from China, Mexico, Mongolia and South Africa.

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.

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