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Thetis Hair Stone. — I noticed this mineral some years a^o filling a 

 vein in the 'I'ownship of Hull. In the rough state it is not a very 

 prepossessing mineral, but when cut tolerably thin it displays its 

 peculiar hair-like markings, floating in a greasy transparent quartz 

 These inclusions are filaments of Actinolite, and when sparingly 

 distributed and less defined they would assist in producing Catseye 

 Quartz. 



Chalcedony.~Vjnd.Qx this heading we must include a number of 

 minerals that differ only in their iranslucency and colour, such as 

 Agates, Onyx, Sardonyx, Hornstone, Chrysoprase, Plasma, Prase, Jasper, 

 Bloodstone and Cachelony, which will be described separately. 



Chalcedony includes those clear, translucent varieties of bright red, 

 yellow and white, often called Carnelian ; when of brownish red it is 

 called Sard. 



These varieties may frequently be found in rolled pebbles on the 

 shores of the Bay of Fundy, Baie des Chaleurs and Lake Superior, also 

 at a few places in British Columbia. 



Hornstone is improperly applied to a cellular cherty mineral from 

 Grenville, of no value for cutting ; but in the neighbourhood of Two 

 Islands, Nova Scotia, a beautiful white translucent variety occurs, 

 which, owing to its extreme toughness and its susceptibility to a high 

 polish, is well suited lor Signet rings, i;tc. 



Agate. — A description of this mineral alone would fill a good- 

 sized volume were we to make any attempt to elaborate on its varieties 

 and occurrence. The three principal localities where it is obtained are 

 Nova Scotia, Lake Superior region in Ontario, and British Columbia. 



From Two Islands, in Minas Bay, to Cape Chignectc, in the Bay 

 of Fundy, and from Digby Gut to Blomidon, on the south side of the 

 Bay, may be called the home of the Agates, occurring at intervals in 

 veins and pebbles, the latter being generally the finest. The varieties 

 mostly met with on the Bay are the variegated and brecciated Agates, 

 although the Fortification and Moss Agates are frequently found, the 

 latter both yellow and green. 



In the neighbourhood of Lake Superior the Fortification Agates 

 predominate, although pretty Moss Agates are often found. In British 

 Columbia the Agates are also of the Fortification type, but generally 



