OXIDES OF COPPEE. 
5 
Oxide of Copper. 
Red Oxide (cuprite, ruby or 
red copper ore), oue of the richest 
ores of copper, rarely occurring in 
large quantities, and generally at 
no great depth. 
Composition of the pure mineral 
(sub-oxide): copper, 88*79; oxy¬ 
gen, 11-21. 
Shelf IV. 
40. Red-oxide OF Copper, cry¬ 
stallized, with native copper. 
Treskerhy Mine, Cornwall. 
Presented by G. C. Fox, 
41 & 42. Red-oxide, massive. 
Knockmahon Mine, County Water¬ 
ford, Ireland. 
Presented by J. Petherick, F.G.S. 
43. Red-oxide, compact and 
crystallized, capillary. 
Knockmahon Mines, County Water¬ 
ford, Ireland. 
44. Cuprite (Red oxide of 
V 
Copper), fine specimen, faces of 
crystals very brilliant. 
Phoenix Mine, Liskeard, Cornwall. 
Presented by Mr. Jas. Seccombe. 
45. Cuprite, magnificent group 
of octohedral crystals, iridescent. 
Huel Gorland, Cornwall. 
Presented by G. C. Fox. 
Shelf V. 
46. Cuprite, with native copper. 
Cornwall. 
Presented by the late E. Phillips, F.K.S. 
46a. Cuprite, fine octohedral 
crystals, with native copper. 
South Huel Frances, Cornwall. 
47. Cuprite, crystallized and 
'massive. 
Cam Brea Mines, Cornwall. 
Presented by the late J. Garby. 
48. A card supporting four 
detached crystals of Red-oxide 
of Copper. 
No. 1.—The cube. 
From Cornwall. 
No. 2.—The octohedron, 
coated with Malachite ; 
No. 3.—The octohedron, 
having the edges replaced by 
six-sided planes, which when 
increased form the rhombic 
dodecahedron No. 4 ; 
Nos. 2, 3, and 4 are from Chessy 
in France. 
Presented by the late G. B. Greenough, 
F.K.S., G.S. 
49 & 50. Cuprite, fine mass of 
octohedral crystals. 
Cam Brea Mine, Illogan, Corn¬ 
wall. 
Presented by the Adventurers of the 
Mine. 
51 & 52. Red-oxide and Na¬ 
tive Copper, crystallized. 
Bedruth, Cornwall. 
Presented by G. B. Greenough, F.E.S. 
53. Cuprite, with condurrite 
(arsenical copper). 
Cornwall. 
54. Cuprite (Tile ore) compact. 
Huel Unity, Cornwall. 
Presented by G. B. Greenough, F.E.S. 
55. Red-oxide, massive, com¬ 
pact, with green carbonate of 
copper. 
Dolcoath Mine, Camborne, Corn¬ 
wall. 
Presented by Captain W. Petherick. 
56. Red and Black-oxides of 
Copper, massive. 
Dolcoath Mine, Camborne, Corn¬ 
wall. 
Presented by Captain W. Petherick. 
Shelf VI. 
Black Oxide (Melaconite, Kup- 
ferschwarze), a substance yielding 
a variable quantity of oxide of 
copper, mingled with the oxides 
of manganese and iron, and con¬ 
taining a large per-centage of 
water. 
57. Black Oxide of Copper. 
Huel Jewel, Gwennap, Cornwall. 
Presented by the late Jno. Williams. 
58. Black Oxide and sulphide 
of copper. 
Marazion Mines, Cornwall. 
59. Black Oxide, with crvs- 
tallized copper and iron pyrites. 
Huel Trenwiih, St. Ives, Cornwall- 
