178 PHYSIOGRAPHY. CLASS II- 



Copper 58-00 56-10. 



Oxygen 12-50 14-00. 



Carbonic Acid 18-00 21-25. 



Water 1 1-50 8-75. 



Its chemical formula is Cu C + Aq, which requires 71-886 

 oxide of copper, 19-962 carbonic acid, and 8-208 water. 

 It is soluble without residue in nitric acid. Before the 

 blowpipe it decrepitates, becomes black, and is partly infu- 

 sible, partly converted into a black scoria. It is easily dis- 

 solved in glass of borax, imparts to it a deep green colour, 

 and yields a globule of metallic copper. 



3. It occurs in the same repositories as prismatic Azure- 

 malachite, by which it is often accompanied. Beautiful 

 varieties of fibrous Malachite are found at Chessy in 

 France, in Siberia, and at Moldawa in the Bannat of Te- 

 meswar; the compact Malachite is chiefly known from 

 Schwatz in the Tyrol. It occurs, besides, in small quan- 

 tities in Cornwall, Wales, and various other countries. 



4. Several varieties, that are sufficiently compact, are 

 cut into vases, snuff-boxes, ring-stones, and other orna- 

 ments. Others are used as pigments. If it occurs in con- 

 siderable quantities, it is a valuable ore for extracting 

 copper. 



ORDER V. MICA. 



GENUS I. EUCHLORE*-MICA. 



1. RHOMBOHEDRAL EUCHLORE-MICA. 



Prismatic Copper Mica. JAM. Syst. Vol. II. p. 184. 

 Hemi-prismatic Copper-Mica. Man. p. 106. Rhom- 

 boidal Arseniate of Copper. PHILL. p. 317. Kupfer- 

 glimmer. WERN. Hoffm. H. B. III. S. 162. Kupfer- 

 glimmer. HAUSM. III. S. 1043. Kupferglimmer. 



From jtf#A$fl$, bright, lively green. 



