December 3, 2013 | Geology.com
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 | Geology.com
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 | Geology.com Store
The Geology.com Store has a nice selection of rock, mineral, gemstone and fossil kits for personal or classroom use.
What is Iris Agate?|
November 27, 2013 | Geology.com
““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 | YouTube.com
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 | 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
What is Petrified Wood?|
October 27, 2013 | Geology.com
Petrified Wood is a fossil that forms when dissolved materials in groundwater precipitate and petrify woody material.
October 25, 2013 | Geology.com
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 | Geology.com
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 | geology.com
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