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Latest Mineralogy Stories

2010-09-14 06:00:00

GONGYI, China, Sept. 14 /PRNewswire-Asia-FirstCall/ -- China GengSheng Minerals, Inc.

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.

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.

2010-01-20 06:00:00

GONGYI, China, Jan. 20 /PRNewswire-Asia-FirstCall/ -- China Gengsheng Minerals, Inc.

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.

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.

2009-09-14 12:52:00

GONGYI, China, Sept. 14 /PRNewswire-Asia-FirstCall/ -- China Gengsheng Minerals, Inc.

2009-07-30 08:24:00

GONGYI, China, July 30 /PRNewswire-Asia-FirstCall/ -- China Gengsheng Minerals, Inc.

2009-06-25 10:21:01

In contrast to diamonds, there are innumerable combinations of types and proportions of cut, and types of facet patterns for colored gemstones.

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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.


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
tourtiere
  • a meat pie that is usually eaten at Christmas in Quebec
The word 'tourtiere' comes from the French tourte, or passenger pigeon.
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