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Latest Mineralogy Stories

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...

7f0ed969a2d0fea5f841a109b2c8288b1
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...

2008-12-18 09:03:00

NEWPORT BEACH, Calif., Dec. 18 /PRNewswire-FirstCall/ -- Collectors Universe, Inc. (Nasdaq: CLCT), a leading provider of value-added authentication and grading services to dealers and collectors of high-value collectibles, diamonds and colored gemstones, today announced that Chief Executive Officer Michael Haynes will present at the 11th Annual Needham Growth Stock Conference on Tuesday, January 6, 2009 at 2:30 p.m. ET at The New York Palace Hotel in New York City. A live and archived...

2008-12-04 10:34:00

DIAMOND EXPERT OFFERS TIPS FOR ONLINE DIAMOND SHOPPING NEW YORK, Dec. 4 /PRNewswire/ -- Holiday season is the second most popular time of year for getting engaged. Buying a diamond is often a life-changing experience not only due to the financial value, but because of the emotional feelings behind giving that gift. In today's recession, consumers can save 30%-60% by shopping online for diamonds. According to Yomesh Shah, president, B2CJewels.com (www.B2CJewels.com), "It is important to...

2008-10-23 15:00:22

Coronado (TSX-V: CRD) has completed its first three shipments of copper mineralization to China. Shipment Dry Arrival Short Grade Contained Payable Fixed China Tons % Cu Pounds Pounds Costs ------- ------ ----- ------- ------- -------- August 513.93 17.67 181,600 143,501 $228,178 September 283.93 21.47 121,920 100,007 $127,216 October 512.75 23.91 245,197...

2008-10-20 09:00:41

DALLAS, Oct. 20 /PRNewswire/ -- The Beryl Institute, an organization dedicated to improving customer service in healthcare, is actively seeking content from healthcare professionals. Content must demonstrate the economic impact of the relationship between customer service initiatives and profitability. Complete submission guidelines are available at http://www.theberylinstitute.com/. "Healthcare professionals from across the country count on The Beryl Institute to provide valuable insight...

2008-09-22 12:00:28

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Sept. 22, 2008) - Miranda Gold Corp. ("Miranda") (TSX VENTURE:MAD)(OTCBB:MRDDF)(FRANKFURT:MRG) is pleased to report that the 2008 drill program at Coal Canyon intersected a thick section of anomalous gold mineralization at the Coal Canyon project in Eureka County, Nevada. In August 2008 Queensgate Resources Corporation ("Queensgate"), Miranda's exploration funding partner, completed 1,950 ft (594.5 m) of reverse-circulation drilling in two vertical...

2008-09-04 03:00:18

By Cook, Robert B Guidebook to the Pegmatites of Western Australia by Mark I. Jacobson, Mark. A. Calderwood, and Benjamin A. Grguric. Hesperian Press, PO Box 317, Victoria Park, WA, Australia 6979 (http:// www.hesperianpress. com). 356 pages; 2007; $85 plus shipping (hardcover). This useful and informative book is a comprehensive treatment of the history, geology, and mineralogy of economically or scientifically significant pegmatites in Western Australia, authored by three experts in the...


Latest Mineralogy Reference Libraries

28_9de5c05320ccdc491872fa501c117601
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...

28_56635877b282726a86b25cf3e98722c2
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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Word of the Day
snash
  • To talk saucily.
  • Insolent, opprobrious language; impertinent abuse.
This word is Scots in origin and probably imitative.