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Latest Mineralogy Stories

2010-07-28 10:33:00

KNOXVILLE, Tenn., July 28 /PRNewswire/ -- Jewelry Television® (JTV), the world's largest retailer of loose gemstones, recently announced the premiere of Tanzanite: The One Generation Gemstone, a documentary-style DVD that explores the history, lore and mining of tanzanite, one of the world's highly sought-after gemstones. Tanzanite: The One Generation Gemstone is part of Jewelry Television's Gemstone Adventure Series collection of DVD documentaries. To view the...

2010-07-16 14:27:37

Chemists from New York University and Russia's St. Petersburg State University have created crystals that can twist and untwist, pointing to a much more varied process of crystal growth than previously thought. Their work, which appears in the latest issue of the Journal of the American Chemical Society, may explain some of the properties of high-polymers, which are used in clothing and liquid crystal displays, among other consumer products. Crystal growth has traditionally been viewed as a...

2010-01-20 06:00:00

GONGYI, China, Jan. 20 /PRNewswire-Asia-FirstCall/ -- China Gengsheng Minerals, Inc. (OTC Bulletin Board: CHGS) ("Gengsheng"), a high-tech industrial materials products company in China with products capable of withstanding high temperatures, saving energy and boosting productivity in certain industries such as steel and oil, today announced that it has entered into an exclusive sales agreement with Junfu Sheng Precision Co., Ltd. to market and sell Gengsheng's fine-precision abrasives...

2009-12-09 20:07:51

In a study that elevates the role of entropy in creating order, research led by the University of Michigan shows that certain pyramid shapes can spontaneously organize into complex quasicrystals. A quasicrystal is a solid whose components exhibit long-range order, but without a single pattern or a unit cell that repeats. A paper on the findings appears in the Dec. 10 issue of Nature. Researchers from Case Western Reserve University and Kent State University collaborated on the study. Entropy...

2009-10-06 11:18:35

Machine-mounted sensors, being developed through CSIRO Minerals Down Under Flagship, could help locate ore deposits, characterize the mining environment, and differentiate ore grades. Scientists are working on a new range of materials characterization analyzers and techniques that could help unlock the value contained in Australia's mineral deposits and improve processing performance, according to the October issue of Process. Machine-mounted sensors, being developed through CSIRO Minerals...

2009-09-14 12:52:00

GONGYI, China, Sept. 14 /PRNewswire-Asia-FirstCall/ -- China Gengsheng Minerals, Inc. (OTC Bulletin Board: CHGS) ("Gengsheng" or "the Company"), a materials technology company in China with products capable of withstanding high temperature, saving energy and boosting productivity in certain industries such as steel and oil, today announced that it has received $337,000 (RMB 2.3 million) from the Henan Provincial Government in subsidy for the development and commercialization of...

2009-07-30 08:24:00

GONGYI, China, July 30 /PRNewswire-Asia-FirstCall/ -- China Gengsheng Minerals, Inc. (OTC Bulletin Board: CHGS) ("Gengsheng" or "the Company"), a materials technology company in China with products capable of withstanding high temperature, saving energy and boosting productivity in certain industries such as steel and oil, today announced that it has started the trial production of its new product, fine precision abrasives, at the Company's newly completed facilities in Gongyi City, Henan...

2009-06-25 10:21:01

"We were astounded when our customer, Markus Wild, approached us and we were not at all certain whether mathematics could offer a solution for the very complex problem of volume optimization of gemstones," says Dr. Anton Winterfeld from the Fraunhofer Institute for Industrial Mathematics ITWM. Jointly with his colleague Dr. Peter Klein, he will receive one of the 2009 Joseph von Fraunhofer prizes for the development of GemOpt, a new industrial process for the volume-optimized utilization of...

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2009-03-25 08:14:02

Red jasper cored from layers 3.46 billion years old suggests that not only did the oceans contain abundant oxygen then, but that the atmosphere was as oxygen rich as it is today, according to geologists. This jasper or hematite-rich chert formed in ways similar to the way this rock forms around hydrothermal vents in the deep oceans today. "Many people have assumed that the hematite in ancient rocks formed by the oxidation of siderite in the modern atmosphere," said Hiroshi Ohmoto, professor...

2009-01-13 13:39:00

VANCOUVER, Jan. 13 /PRNewswire-FirstCall/ - Evolving Gold Corp. (TSXV:EVG) (FSE:EV7) (the "Company") is pleased to announce additional assay results which continue to expand the zone of gold mineralization. Hole RSC-012 intersected an aggregate of 359.6 meters of 0.90 gpt gold (1,179ft of 0.026 oz/ton) in seven intervals. "The results from RSC-012 confirm and expand the size of the zone of gold mineralization at Rattlesnake and provide first indications of significant near surface...


Latest Mineralogy Reference Libraries

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2005-05-26 12:19:41

Amphibole defines an important group of dark-colored rock-forming inosilicate minerals composed of double chain SiO4 tetrahedra linked at the vertices and generally containing ions of iron and/ or magnesium in their structures. In chemical composition and general characteristics they are very similar to the pyroxenes and, like them, fall into three series according to their system of crystallization. The chief difference between amphiboles and pyroxenes is in cleavage: amphiboles form oblique...

28_9c404ab9a4754b403781670c9e631915
2005-05-26 11:59:32

he mineral calcite is a calcium carbonate corresponding to the formula CaCO3 and is one of the most widely distributed minerals on the Earth's surface. It is a common constituent of sedimentary rocks, limestone in particular. It is also the primary mineral in metamorphic marble. It also occurs as a vein mineral in deposits from hot springs, and also occurs in caverns as stalactites and stalagmites. Calcite is often the primary constituent of the shells of marine organisms (e.g. plankton,...

28_d2c55a2f2b1619323d50ee8c6db10bb5
2005-05-26 11:56:59

Celestite (SrSO4) is a mineral consisting of strontium sulfate. The mineral is also known as celestine and is named for its occasional delicate blue color. Celestite occurs as crystals, and also in compact massive and fibrous forms. It is mostly found in sedimentary rocks, often associated with the minerals gypsum, anhydrite, and halite. The mineral is found worldwide, usually in small quantities. Pale blue crystal specimens are found in Madagascar.

28_5f496c15049ba89cd8c43810810e311e
2005-05-26 11:32:33

Chalcocite, copper(I) sulfide (Cu2S), is an important copper mineral ore. It is opaque, being colored dark-gray to black with a metallic luster. It has a hardness of 2½ - 3. It is a sulfide with an orthorhombic crystal system. Chalcocite is sometimes found as a primary vein mineral in hydrothermal veins. However, most chalcocite occurs in the supergene enriched environment below the oxidation zone of copper deposits as a result of the leaching of copper from the oxidized minerals. It is...

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2005-05-26 11:30:45

Chert is a fine-grained silica-rich cryptocrystalline sedimentary rock that may contain small fossils. It varies greatly in color from white to black, but most often manifests as gray, brown, grayish brown and light green to rusty red; its color is an expression of trace elements present in the rock, and both red and green are most often related to traces of iron (in its oxidized and reduced forms respectively). It outcrops as nodules in limestone, chalk, and dolostone formations as a...

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