39 
Case 35. Ores of copper continued : among saloon. 
the specimens of compact malachite, the most beau- natThist. 
tiful and characteristic are those from the Guma- 
shevsk and Turja mines in the Ural mountains. 
-—Anhydrous carbonate of copper.—Werner’s 
frothy copper ore from Hungary.—In this case 
is also placed the copper-green of Werner, by 
some called chrysocolla, a substance often con¬ 
founded with common green carbonates of cop¬ 
per, but which contains much silica.—To the 
silicates of copper may likewise be referred the 
dioptase, a very scarce substance from Siberia, 
also called emerald copper, on account of its 
pure green colour; and the very scarce sky blue 
velvet copper ore.—Phosphate of copper from 
Nassau and Hungary.— Muriate of copper , crys¬ 
tallized and laminar: to which also belongs 
what is called green sand of Peru, or atacamite , 
from being found in the desert of Atacama, be¬ 
tween Chili and Peru, as sand of a small river. 
The rest of this case is occupied by the principal 
varieties of the different arseniates of copper , 
namely, the foliated arseniate, or copper mica, 
the lenticular arseniate, or lentil ore, and the 
olive ore of Werner, which are formed into five 
distinct species by some mineralogists. (A 
greater variety of arseniates of copper will be 
found in the collection of British Minerals: 
Cornwall.) 
Case 36, and part of 37, contain, besides the 
arsenical iron (called also arsenical pyrites and 
mispikel). 
