rupj-Kii okks. 299 



solution and effervescence in nitric acid. The color also 

 is not the bluish-green of chrysoc611a. ■ 



Obs. Green malachite usually accompanies other orf>9 

 of copper, and forms incrustations, which when thick, have 

 the colors banded and extremely delicate in their shades and 

 blending. Perfect crystals are quite rare. The mines of 

 Siberia, at Nischne Tagilsk, have afforded .great quantities 

 of this ore. A mass partly disclosed, measured at top 9 

 feet by 18 ; and the portion uncovered contained at least 

 half a million pounds of pure malachite. Other noted for- 

 eign localities are Chessy in Fiance, Sandlodge in Shetland, 

 Schwartz in the Tyrol, Cornwall, and the island of Cuba. 



The copper mine of ( Cheshire. Cojui,, has afforded hand- 

 some specimens ; also Morgan! own, Perkiornen and Phenix- 

 ville, Penn. ; Schuyler's mine, and the New Brunswick 

 copper mine, N. J. : it occurs also in Maryland, between 

 Newmarket and Taneytown, and in the Catoctin mountains ; 

 in the Blue Ridge, Penn., near Nicholson's Gap, and it is 

 found more or less sparingly with all kinds of copper ores. 



At Mineral Point, Wisconsin, a bluish silico-carbonate 

 of copper occurs, which is for the most part chrysocolla, or 

 a mixture of this mineral with the carbonate. An analysis 

 of the rough ore afforded Mr. D. D. Owen, copper 35*7, 

 carbonic acid 10*0, water 10*0, iron 15*^7, oxygen 7, sulphur 

 8, silex 13-0. Specific gravity 3-69—3-87. The vein ap- 

 pears also to the northwest on Blue River, and southeast on 

 the Peccatonica. This ore is abundant ; it has been smelted 

 on the spot and also exported to England. . 



Uses. This mineral receives a high polish and is used 

 for inlaid work, and also ear-rings, snuffboxes, and various 

 ornamental articles. It is not much prized in jewelry. 

 Very large masses are occasionally obtained in Russia, 

 which are worked into slabs for tables, mantel-pieces and 

 vases, which are of exquisite beauty, owing to the delicate 

 shadings of the radiations and zones of color. At Versailles, 

 there is a room furnished with tables, vases, and other arti- 

 cles of this kind, and similar rooms are to be found in many 

 European palaces. At Nischne Tagilsk, a block of mala 

 chite was obtained weighing 40 tons. 



Malachite is sometimes passed off in jewelry as turquois, 

 hough easily distinguished by its shade of color and much 



How does green malachite occur '? Wl 



