. ore, compact, foliated, and ftbrous; one of the more saloon. 
, remarkable is the bright red capillary variety from naiThist. 
Rheinbreitenbach, in Nassau. To these are added a 
few specimens of what is called tile-red copper, or tile 
ore, a mixture of red copper ore and brown iron ochre. 
(Case 34.) Ores of copper continued: blac/c cop- 
per massive, and as superficial covering of other 
copper ores.— Carbonates of copper: crystallized 
radiated bhie or azure copper, from Chessy and the 
Bannat, combined with various substances, and 
earthy varieties of the same, some of which (called 
mountain-blue) have been used as pigments.— 
Crystals passing from the state of blue copper into 
that of green carbonate (cuivre carbonate bleu ^pi- 
g^ne Haiiy,) —Green carbonates of copper; among 
which are the beautiful varieties of fibrous malachite 
of velvety appearance, in acicular crystals, with car¬ 
bonate of lead, &c. 
(Case 35.) Ores of copper continued: among the 
specimens of compact malachite, the most beau¬ 
tiful and characteristic are those from the Guma-^ 
shevsk and Turja mines in the Ural mountains.— 
Anhydrous carbonate of copper.—In this case is 
also placed the copper-gi'een of Werner, by some 
called chrysocolla, a substance often confounded 
with common green carbonates of copper, 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 
