Skey and McKay. — On Minerals from Steivart Island. 417 



■ The somewhat rare mineral wolfram (tuiigstate of iron) I do 

 not here describe, as it has already been identified by Dr. Black. 



These comprise all the rare, or comparatively rare, minerals 

 now known to exist associated with the tin-ore of Stewart 

 Island. It will be observed that they comprise all, or nearly 

 all, those minerals that are generally associated with tin. 



In none of the other deposits of tin-ore known to exist in 

 these islands has there been anything near the same variety 

 of minerals discovered — for the simple reason, I suppose, that 

 the other deposits have not been explored as completely as 

 that in Stewart Island. 



I should i-emark here that this is the first time that what 

 I may term "rock-topaz" has been identified as existing in 

 the colony. Perhaps this is because in this form it is easily 

 mistaken for quartz by miners. 



Eegarding the very interesting mineral fluor-spar, this is 

 the first time that its occurrence in the colony as a native 

 product has been certified to upon good authority. Just re- 

 cently, however, I had the pleasure of identifying the same 

 mineral in a collection, made by Mr. James Park, F.G.S., re- 

 presentmg the rocks and minerals of the Baton Eiver, in the 

 Nelson District. 



I will conclude my part of this paper by stating my results 

 upon certain other minerals of this collection which have also 

 been analysed. 



No. 5218, a white, soft, light rock, resembling siliceous mud, 

 given to Mr. McKay by Mr. Eussa, of Invercargill, contains 

 very distinct traces of silver. On the authority of Mr. Eussa 

 the specimen is referable to the Paterson's Inlet district of 

 Stewart Island. The quantity of material was not sufiicient 

 to allow the quantitative determination of this metal. 



No. 5249. Limonite. 



Aiialysis. 

 Water .. .. .. .. ,. 19-24 



Iron-sesquioxide .. .. .. .. 78-55 



Siliceous matter . . . , . . . . 2-21 



100-00 

 A very useful ore if in quantity and fairly accessible. 



27 



