Search results
Results from the WOW.Com Content Network
According to the Gemological Institute of America, it is "the largest gemstone of any kind, cut in the United States". [5] The Washington Post called it "hypnotic, a miniature green hall of mirrors". [2] Smithsonian mineralogist Jeffrey Post said "This tsavorite is truly one of the most important colored gemstones to have been mined this decade ...
Cave of the Crystals or Giant Crystal Cave (Spanish: Cueva de los cristales) is a cave connected to the Naica Mine at a depth of 300 metres (980 ft), in Naica, Chihuahua, Mexico. It takes the form of a chamber within the limestone host rock of the mine, and is about 109 metres (358 ft) long with a volume of 5,000 to 6,000 cubic metres (180,000 ...
Samarian Spinel, the world's largest spinel; Menshikov Ruby, the world's second largest spinel set on top of the Great Imperial Crown of Russia; Timur Ruby, believed to be a ruby until 1851, hence its name; Black Prince's Ruby, the famous spinel mounted on the Imperial State Crown of the United Kingdom
This page provides a comprehensive list of U.S. state minerals, rocks, stones, and gemstones.
The Bahia Emerald is one of the largest emeralds and contains the largest single crystal ever found. The stone, weighing approximately 379 kg (836 lbs) [1] (approximately 189,600 carats) originated from Bahia, Brazil; its emerald crystals embedded in black schist.
The Jones Diamond, also known as the Punch Jones Diamond, The Grover Jones Diamond, or The Horseshoe Diamond, was a 34.48 carat (6.896 g) alluvial diamond found in Peterstown, West Virginia by members of the Jones family. It remains the largest alluvial diamond ever discovered in North America.
The Empress of Uruguay is the world's largest amethyst geode, standing at a height of 3.27 meters. It is open along its length and weighs 2.5 tons in its current state. It was discovered in 2007 in the Artigas department, Uruguay by the Uruguayan mining company Le Stage Minerals.
Inclusions can be found in these crystals that provide clues to the origins of the Herkimer diamonds. Found within the inclusions are solids, liquids (salt water or petroleum), gases (most often carbon dioxide), two- and three-phase inclusions, and negative (uniaxial) crystals. A black hydrocarbon is the most common solid inclusion.