1851.] Report on the Copper Ores of the Beoghur Mines. 7 



No. 5. Schorly granite, or schorl rock of Cornwall, (See Boase, 

 Primary Geology, p. 16,) schorl and quartz in distinct grains and im- 

 perfect crystals. 



No. 6. Garnet rock, or garnetiferous quartz rock according to 

 McCulloch (p. 326), who makes one of his subdivisions of quartz rock 

 to be a granular quartz containing but little felspar, as in our specimen, 

 in which it can be scarcely distinguished. Not an atom of mica is to 

 be seen, but the garnets, (some small ones being semi-crystallized,) are 

 abundant, and it might, so far as the presence of three ingredients is 

 necessary to constitute a granite, be called a garnet granite. 



No. 7.* Compact pegmatite with veins of massive pistacite epidote. 



No. 8. White and flesh-red felspar with nests and veins of acicular 

 crystallized epidote (pistacite) of a bright pale green. 



Part II. — The ores and their description. 



After a most minute and careful examination as above described in 

 my letter, I class the ores as follows : 



1st Group. f Bright Peacock ore. A.. 



Variegated cop- J Dull Peacock. B. 



per ores, called Pea- | Marbled Peacock with a pale "V C. contains sil- 



cock ores by the ^ greenish gossan.f Jver. 

 miners. 



2nd Group. f Dull Massive Grey Copper. D. Silver. 

 Grey Coppers. \ Bright Grey Copper. E. 



„ip C Bright brick red Pacos. F. Silver. 



t> i "' Dull, pale red, to liver-colour- 1 ~ Q ., 



Red ores. ed P I **' Silver. 



The Pacos and< ^ ? I -. , ,. J 



f i j f p | Dark hard veins resembling | 



and°Mexico° ^ Tile " ore with soft shmin S black ?H. Silver. 

 [_specks and veins in it. J 



4th Groun f Bluish green ' *: arth y. carb °-] 



p *■' < nates of copper, with bright red f I. Silver. 



L specks. 



{Bright large-grained Galenas. J. 

 Cupro-Plumbite, an ore of 1 

 copper and lead, in diagonally >K. 

 lamellar veins. J 



* This is No. 12 of Captain Sherwill's list where it follows the ores. 



f Two small nodular specimens of this variety, of a dark earthy liver-coloured 

 aspect, seem richer than the rest, but I have only these as yet and cannot spare 

 them for a quantitative analysis. 



