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malachite

The Columbia Encyclopedia, Sixth Edition | Date: 2008

malachite , a mineral, the green basic carbonate of copper occurring in crystals of the monoclinic system or (more usually) in masses. It is translucent or opaque; the luster is silky, vitreous, adamantine, or dull. It takes a good polish. An important ore of copper, it also serves as a gem and for various ornamental purposes and, when finely ground, as a pigment. It is found associated with other ores of copper (especially azurite ) in various parts of the United States and in Chile, Russia, Congo (Kinshasa), Zimbabwe, and Australia.

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	Malachite. Rocks & Minerals; 9/1/2001; COOK, ROBERT B.; 3121 words ; ... general populace to name any ten minerals, malachite would likely appear on many lists, primarily ... uninitiated would not understand that malachite also has been a historically important ... individual masses weighing many tons and in malachite-dominated bodies weighing hundreds, if ... Read more
	The Curly Malachite of Schwaz-Brixlegg, Tyrol, Austria. Rocks & Minerals; 9/1/1998; WIGHT, QUINTIN; 2302 words ; ... providing specimens of unusual forms of malachite not before observed in quantity. Collectors are used to malachite as reniform or botryoidal masses, frequently ... recycling, not from primary ore. The new malachite find lies deep in the forest near the ... Read more
	CFIA: Federal Government Revises its Approach to Malachite Green in Aquacultured Fish and Fish Products CCNMatthews Newswire; 4/3/2006; 324 words ; ... with the presence of trace amounts of malachite green and its metabolite, leucomalachite ... consumption of fish containing trace amounts of malachite green and leucomalachite green is remote ... nada's assessment, and the possibility that malachite green may be an unavoidable contaminant ... Read more
	SA: Malachite touts the economic prospects of its healthy metals AAP General News (Australia); 6/19/2008; 289 words ; SA: Malachite touts the economic prospects of its healthy metals ADELAIDE, June 19 AAP - Malachite Resources hopes seemingly endless demand ... company-making mine. AAP lk/jpm/cdh KEYWORD: MALACHITE RESOURCES 2008 AAP Information Services ... Read more
	HONG KONG: LESS MALACHITE GREEN DETECTED IN FRESHWATERFISH. IPR Strategic Business Information Database; 8/23/2005; 121 words ; According to news.gov.hk: Laboratory tests show malachite green levels in freshwater fish arelower than those in eels and eel products. The highest level of malachite green found in eels was 4,500 micrograms per kilogram while the highest level for freshwater fish was 900?g/kg. Thirty-fourfish samples were ... Read more
	Fish farms urged to stop using 'malachite green' New Straits Times; 8/27/2005; 164 words ; ... Straits Times 08-27-2005 Fish farms urged to stop using 'malachite green' Edition: Main/Lifestyle PUTRAJAYA, Fri. - Aquaculture breeders have been told to stop using "malachite green", a chemical to treat fish for parasites, bacteria ... said the department had to issue this warning following news reports ... Read more
	Marathon PGM Corporation Announces Final Drilling Results in the Malachite Zone Including 16 m Grading 9.48 g/t PGM +Gold and 0.36 % Copper CCNMatthews Newswire; 1/9/2006; 1029 words ; ... drilled in the southern end of the Malachite zone. Holes M-05-124, 125 and 126 ... required in the southern part of the Malachite Zone in 2006. The other eight holes were drilled in the north end of the Malachite Zone. The best intercept was in M- ... Read more
	Malachite Green Lipid Phosphatase assay.(Immunological Reagents And Assays Focus) Bioscience Technology; 6/1/2004; 81 words ; Malachite Green Lipid Phosphatase assays offer a nonradioactive alternative for measuring specific phosphatase activities. Seven ... The assay is designed for in vitro measurement of lipid phosphatase activity by detecting free phosphate enzymes using malachite green. The water-soluble lipid substrates used have the ... Read more
	CFIA: Health Hazard Alert-Empire's Choice Grilled Eel May Contain Nitrofurans and Malachite Green Residues CCNMatthews Newswire; 3/24/2006; 241 words ; ... may be contaminated with Nitrofurans, Malachite Green (MG), and Leucomalachite Green ... related to the toxicity of the drug. Malachite Green is not approved in Canada for use ... Leucomalachite Green (LMG), a metabolite of Malachite Green (MG), may pose a risk to human ... Read more
	Diamonds & Gemstones. (Malachite - Star Ruby). Jewelers Circular Keystone; 12/1/2002; 16079 words ; Diamonds & Gemstones. (Malachite - Star Ruby) Malachie A B A & V Imports I NY 1 2 Accents In Ster AZ 2 B Albert David Pe NY 1 A Allen John F & RI ... Unlimited LA 1 A Gemscapes Sculp MI 2 Golden Dragon J CA 1 H I J Goldman Allan A NY A C D E F G H J Good Neighbor G CO 1 2 Good News Lapid VT 1 Good ... Read more

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Related entries from encyclopedias, dictionaries, and thesauruses

	malachite Britannica Concise Encyclopedia ... weathered zone of nearly all copper deposits, malachite serves as a prospecting guide. It is found in Siberia, France, Namibia, and Arizona. Malachite has been used as an ornamental stone and as a gemstone. malachite malachite malachite Read more
	malachite The Concise Oxford Dictionary of English Etymology malachite XVI ( melo- ). — OF. melochite (now malachite ) — L. molochītēs — Gr. molokhîtis , f. molókhē , var. of malákhē MALLOW ; see -ITE . Read more
	malachite The Oxford Pocket Dictionary of Current English mal·a·chite / ˈmaləˌkīt / • n. a bright green mineral consisting of copper hydroxyl carbonate. It typically occurs in masses and fibrous aggregates with azurite and is capable of taking a high polish. Read more
	azurite The Columbia Encyclopedia, Sixth Edition ... occurring in monoclinic crystals or masses that range from transparent to translucent and opaque. It is usually associated with malachite , which it resembles except in color; when the two minerals are very closely associated, the stone is called azurmalachite ... Read more
	(Peter) Carl Faberge Britannica Concise Encyclopedia ... 1870. The objects he designed quickly won him the patronage of European and Russian royalty. Specializing in gold, silver, malachite, jade, lapis lazuli, and gemstones, he manufactured not only conventional jewelry but objects of fantasy, much of it inspired ... Read more