MINERALS OF NEW ZEALAND. 269 
Drattoaits ! !—Thames (Hector, 1881), associated with calamine ; 
Makara (Skey, 1870). 
Ditessite !—Mount Somers, fine earthy mineral filling up 
cavities in melaphyres (Haast). 
Dioprase !—Thames, Nelson, occurs as an encrustation on the 
copper ores (Skey). 
DotomitE !—Malvern Hills, interstratified with augitic sand- 
stone (Haast, 1865) ; Collingwood (Hector, 1872). 
DoppieritE !—Waiapu, formed as a surface deposit by oxidation 
of exuded petroleum. Analysis (Skey) 
Oils 3:1 
Paraffin ee 9°3 
Earthy matters as seidinzce 
Water aes ee se extghlie 
Oxygenated hydro-carbons 49-4 
100-0 
DuFeRENoysITE !—Great Barrier Island, as a fine crystalline 
vein associated with galena in large crystals (Hutton). 
Dunite ! !—Dun Mountain, found in masses (Hochstetter), named 
by Hector, 1863. Analysis (Reuter) :— 
Silica is nce ... 42°80 
Magnesia... ore pea (ES 0) 
Protoxide of iron ne et 0 
Water eh ae a DT 
100715 
ELaTeritE !—Kawau (Hector, 1865), hardness 2 sp. gr. 1-034 ; 
Poverty Bay (Liversidge, 1877). 
Eectrum !! !—Thames, usually found in places where gold 
occurs. 
Emeraxp !—Dusky Sound, in quartz with pyrrhotine (collected 
by Dockerty, determined by Cox and Skey). 
Kripote !—West coast of Otago, in granites (Hector) ; Mount 
Torlesse, in diorites (Haast); Wairarapa, in massive 
form (Hector). Analysis (Skey) :— 
Silica bet me MP All 
Tron ae ae <<..0pfl 4-06 
Alumina aa os ee Weer 
Lime ns ae eed WER: 
Magnesia... ee eek 
Water of constitution aa 4:10 
100-00: 
