Latest Mineralogy Stories
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...
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...
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...
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...
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...
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...
By Smith, Arthur E The Amethyst, Commodore No. 5 & Bulldog Mountain Mines Mineral County, Colorado Creede is located in southwestern Colorado on the edge of the San Juan Mountains just south of where Willow Creek enters the Rio Grande Valley. Originally, the townsite was further north in East Willow Creek Canyon near the confluence with West Willow Creek. A disastrous fire in 1894 wiped out the town, and a new settlement sprang up to the south at a location at first called Jimtown. What...
By Anonymous Benefactors & Fellows Back in 1926, Washington Augustus Roebling (1837-1926), one of the leading mineral collectors of his day, donated $45,000 (the equivalent of several million dollars today, depending on how you calculate inflation) to form an endowment to help publish the American Mineralogist. That endowment fund has grown substantially since then, and is still providing critical financial support for the journal. Likewise the Helen Dwight Reid Educational Foundation was...
TORONTO, ONTARIO--(Marketwire - Aug. 5, 2008) - Goldstake Explorations Inc. (TSX:GXP)(FRANKFURT:GOO) announces that a 10 hole diamond drill program totaling 2,200 metres has been completed on gold-copper-silver mineralization in the Instant Pond Zone on its Clay Property in northeastern Ontario. Visible gold was intersected by 3 of the first 4 holes drilled during program. The holes tested the central and southwest sections of the Instant Pond Zone. Visible gold was also observed in two...
VANCOUVER, BRITISH COLUMBIA--(Marketwire - July 24, 2008) - George W. Sanders, President of Goldcliff Resource Corporation (TSX VENTURE:GCN) is pleased to report that the 2008 exploration activities are well underway on Goldcliff's Panorama Ridge and Tulameen projects. After completing the initial phase in the summer and fall of 2007, the 10,000 metre drilling program at the Company's 100% owned Panorama Ridge gold property near Hedley, B.C. has resumed. At present, twenty one holes have been...
Latest Mineralogy Reference Libraries
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...
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,...
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.
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...
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...
![Curiosity \](/media/gallery/mars-science-laboratory/thumbs/thumbs_719054main_pia16569-43_946-710.jpg "Curiosity \")
![Curiosity \](/media/gallery/mars-science-laboratory/thumbs/thumbs_733481main_blake-2pia16830-43_946-710.jpg "Curiosity \")
