Latest Mineralogy Stories
HONG KONG, May 28, 2015 /PRNewswire/ -- IGI Hong Kong reports that this week it certified what it believes is the world's largest HPHT-grown colorless diamond, a 10.02 carat Square Emerald Cut.
DUBLIN, May 14, 2015 /PRNewswire/ -- Research and Markets ( http://www.researchandmarkets.com/research/t5dvtl/global_coated) has announced the addition of the "Global Coated
LONDON, May 11, 2015 /PRNewswire/ -- This report analyzes the worldwide markets for Alumina Zirconia Oxide Abrasives in US$ Thousands.
-- Millions more have access to trusted information on gems and jewelry CARLSBAD, Calif., April 8, 2015 /PRNewswire-USNewswire/ -- GIA's website at
Brush Research Manufacturing (BRM) announces article and video about NamPower
DUBLIN, Feb .11, 2015 /PRNewswire/ --Research and Markets
Researchmoz.us announces that a new market research report is available in its catalogue: European Abrasive Product Manufacturers Market Albany, NewYork (PRWEB)
The Liquidation Channel announces the return of the Ruby Smackdown. AUSTIN, Texas (PRWEB) February 04, 2015 Valentine’s Day is just around the corner,
DUBLIN, Feb .02, 2015 /PRNewswire/ --Research and Markets
GIA announces the release of a comprehensive global report on Alumina Zirconia Oxide Abrasives.
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 2Â½ - 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...
- An uxorious, effeminate, or spiritless man.
- A timorous, cowardly fellow.