Latest Crystallography Stories
The Ophir Sapphire is included in the sale of a larger collection of gemstones that has been awarded nine Guinness World Records titles ATLANTA, June 30, 2014 /PRNewswire/ -- Ophir
Containing the world's largest gemstones, the Ophir Collection (http://www.OphirCollection.com), owned by Ophir Collection LLC,
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Rissa Cassandra enchants her readers with ‘Sapphire’s Glow’. VICTORIA, Australia (PRWEB) June 06, 2014 An exciting tale of
The fourth annual Midwest Soil Improvement Symposium is scheduled for August 13, 2014 in Manhattan, KS.
NEW YORK, June 4, 2014 /PRNewswire/ -- American Securities LLC, a leading U.S.
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Diamond Envy now offers loose Zambian and Colombian emeralds and emerald jewelry for sale through their e-commerce website. New York, NY (PRWEB) May 05, 2014
EAGLE MOUNTAIN, Utah, April 29, 2014 /PRNewswire/ -- A Utah company is on the brink of revolutionizing the world of open-water swimming with the development of IOLITE, a small, high-precision
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...
Aragonite is a polymorph of the mineral calcite, both having the chemical composition CaCO3. Its structure differs from calcite and leads to a different crystal shape, an orthorhombic system with acicular crystals. By repeated twinning pseudo-hexagonal forms result. It may be columnar or fibrous, occasionally in branching stalactitic forms called flos-ferri (flowers of iron) from their association with the ores at the Carthinian iron mines. The type location for aragonite is Molina de...
Aurichalcite is a mineral, usually found as a secondary mineral in copper and zinc deposits. Its chemical formula is (Zn,Cu)5(CO3)2(OH)6. The name probably originates from the Greek oreichalchos meaning "mountain copper".
The mineral kyanite is an aluminium silicate of the sillimanite group (along with andalusite and sillimanite), also called alumino-silicate. It has the formula Al2O3Â·SiO2 (Al2SiO5). Its hardness varies widely depending on its crystallographic direction, from 5 to 7.5, and it has a specific gravity of 3.56-3.67. It is translucent, usually blue, but possibly white, gray, green, or black. It is usually found in long-bladed crystals or columnar to fibrous structures. Kyanite is used in...
Limonite Limonite is a ferric hydrate of varying composition, the generic formula is frequently written as FeO(OH)Â·nH2O, although this is not entirely accurate as Limonite often contains a varying amount of oxide compared to hydroxide. Together with hematite, it is mined as ore for the production of iron. Limonite is heavy and yellowish-brown. It is not a true mineral, however, but a mixture of similar hydrated iron oxide minerals, mostly Goethite. Limonite forms mostly in or near...
- The analysis of literature, focusing on the words and grammar to the exclusion of context or literary merit.