502 Transactions. — Geology. 
Native Mercury.—Tokomairiro. 
In the form of minute globules, mainly more or less hidden away in the 
crevices. The dark veins contain, in addition to mercury, both copper and 
sulphur. 
Cinnabar.*—W aipori. 
In the form of rolled fragments, which show traces of crystallization in 
the cavities. A very rich and highly valuable ore of mercury. 
Cinnabar.—Bay of Islands. 
Earthy and associated with petroleum. 
Native Copper.—Moke Creek. Presented by Mr. J. S. Worthington. 
Rolled nodule, somewhat cavernous, more or less coated with cuprite 
(the red oxide) and malachite (hydrous green carbonate of copper); asso- 
ciated with them are adherent fragments of quartz evidently a portion of 
the veinstuff. 
Cuprite.] —Dun Mountain. 
Impure, coated in part with green carbonate of copper. When pure 
this ore contains 88:8 per cent. of metallic copper. 
Bornite.—Dunstan. 
In micaceous quartz with a somewhat schistose structure, mixed with a 
little common copper pyrites and green carbonate. One portion is from a - 
rolled nodule. This variety of copper pyrites, when pure, contains about 
70-1 per cent. metallic copper. 
Chrysocolla.—Nelson. 
A specimen of the impure green hydrated silicate of copper. 
| Chalcopyrite.—Moke Creek. 
The common variety of copper pyrites. : 
Mispickel.—Collingwood, Nelson. 
In small but fairly well-formed erystals. This mineral is an arsenical 
sulphide of iron. 
Antimonite.1 —Union Jack Reef, Mullocky Gully. 
Massive crystallized sulphide of antimony, associated with cervantite, 
the yellow oxide of antimony, and some quartz. 
‘ad.§—Thames Goldfield. 
An impure earthy form of manganese binoxide ; associated with quartz. 
Rhodonite, || —Dunstan. 
A massive form of the silicate of manganese, mixed with a little bin- 
oxide of manganese. This mineral forms a very beautiful ornamental 
stone when cut and polished. 
| * Rep. N. Z. Exh., 1865, p. 404. t And others, Rep. N. Z. Exh., p. 405. 
= i Rep. N.Z. Exh., p. 404. _§ Geol. Reports, 1870, p. 87. || Rep. N.Z. Exh., p. 413. 
