602 Transactions. — Geology. 



Native 2Iercury. — Tokomairii'O. 



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.'^'- — Waipori. 



In the form of rolled fragments, which show traces of crystaUization in 



the cavities. A very ricla 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. 



EoUed 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. 



Clirysocolla. — Nelson. 

 A specimen of the impure green hydrated silicate of copper. 



Chalcopyrite. — Moke Creek. 

 The common variety of copper pyrites. 



MisjncJcel. — Collingwood, Nelson. 

 In small but fahly well-formed crystals. This mineral is an arsenical 

 sulphide of iron. 



Antimonite.l — Union Jack Eeef, Mullocky Gully. 

 Massive crystaUized sulphide of antimony, associated with cervantite, 

 the yeUow oxide of antimony, and some quartz. 



Wad.^ — Thames Groldfield. 

 An impure earthy form of manganese binoxide ; associated with quartz, 



PJiodonite. \\ — 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 pohshed. 



*Eep. N. Z. Exh., 1865, p. 404. f And others, Eep. N. Z. Exh., p. 405. 



+ Hep. K.Z. Exli., p. 404. § Geol. Eeports, 1870, p. 87. \\ Eep. N.Z. Exh., p. 413. 



