39 
ore^ compact, foliated, and fibrous; one of the more 
remarkable Is the bright red capillary variety from 
llheinbreitenbach, 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: black cop- 
ner massive, and as superficial covering of other 
copper ores.— Carbonates oj copper: crystallized 
radiated blue 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 
epighie Haiiy.) —Green carbonates of copper; 
among which are the beautiful varieties of fibrous 
malachite of velvety appearance, in acicular crystals^, 
with carbonate of lead, &c. 
(Caseoh.) 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-green 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 
SALOOK- 
Nat. Hisrj 
