OCCURRENCE OF TIN" IN NOVA SCOTIA. PIERS. 243 



mercial value. The largest of these crystals, which is now in 

 the museum, with two others nearly as large, measures 27 

 inches in length by 10 inches in thickness. Theee are by far 

 the largest quartz crystals ever found in Nova Scotia, and they 

 bear favorable comparison with large crystals found elsewhere 

 in America. 



Mica was not as abundant as I had expected, as I sup- 

 posed it might have been segregated into large masses commen- 

 surate with the size of the quartz and feldspar crystals. Such 

 possibly may yet be found to be the case in another part of 

 the deposit. Most of the mica, especially in the more aplitic 

 parts, is a lithia mica, probably lepidolite, sometimes with a 

 delicate lilac-pink tint. 



The cassiterite occurred in small quantities in the kaolinite, 

 as far as shown by the material then taken out, although it was 

 lioped that elsewhere in the deposit it might be found more 

 largely segregated. It could not be ascertained if the ore 

 occurred specially in any particular part of the deposit or in a 

 pay-shoot. 



Associated with the pegmatite and kaolinite were also 

 purplish-black fluorite, amblygonite .of a beautiful light blue 

 color (the first time this mineral has been discovered in Can- 

 ada), black tourmaline, wolfram, tungstite, scheelite, molyb- 

 denite, etc. 



Subsequent to my visit another dike or vein carrying tin 

 was reported to have been found near the main road, not far 

 from the first locality. 



From samples brought to the museum, I find that some of 

 tho grey and reddish granites near Lake Ramsay carry small 

 amounts of chalcopyrite or pyrite; and small vugs in some of 

 the reddish granitic rocks contain deposits of purple fluorite 

 as well as the sulphides. Slender crystals of transparent tour- 

 malino with a dark outer shell occur in a hematite-coated 

 quartz bouldor from tho shore of Lake Ramsay. Ordinary 



