MINERALS AND GEOLOGY OF CANADA. 177 
and Blende, B3.) The gold of the Eastern Townships contains, 
according to Professor Sterry Hunt, from 11 to 13 per cent. of silver. 
Small grains of Platinwm and Iridosmiwm are mixed with it here 
and there, as in the sands of the Riviere du Loup, &c. 
Native Silver.—Silver-white, often with dark or yellowish external 
tarnish. Found chiefly in crystalline arborescent groups, and in small, 
scaly, granular, or wire-like masses, associated with native copper, at 
St. Ignace and Michipicoten Islands ; and with sulphide of silver, &c., 
in calcareous spar, at Prince’s Mine, Spar Island, Lake Superior. 
Sp. gr. 10-11. Easily fusible. 
Sulphide of Silver (or Silver Glance).—Dark lead-grey or black, 
with shining streak. Perfectly ductile. Chiefly in small masses with 
native silver, sulphide of copper, galena, malachite, &c., in a vein of 
quartz and cale spar, at Prince’s Mine, Lake Superior. Sp. gr. about 
7.2. Fusible and reducible to metallic silver per se before the blow- 
pipe. One hundred parts contain: Sulphur, 18; silver, 87. It is 
easily distinguished from sulphide of copper, galena, &c., by its per- 
fect malleability, as well as by its blow-pipe characters. 
Native Copper :—Copper-red, with shining streak. Chiefly in 
arborescent and amorphous masses, more rarely in determinable 
erystal-groups (Monometric.) H. 2.5-3.0. Perfectly malleable. 
Sp. gr. about 8.9. Easily fusible, imparting a green colour to the 
flame, Native copper occurs in immense abundance on the south 
shore of Lake Superior, but on the Canada side of the lake it has 
been found in small quantities in St. Ignace and Michipicoten Islands. 
In the latter Island, at Maimanse and Mica Bay, accompanying copper 
glance and copper pyrites. It does not appear to occur at all amongst 
the extensive deposits of copper pyrites, &c., on Lake Huron. In the 
Eastern metamorphic district, native copper is said to have been 
noticed at St. Henri, Dorchester County. 
B. 2. Yielding to the Nail 
[Principal Minerals: Streak white, Mica. Streak black, colour, black or dark- 
grey: Graphite. Streak and Colour lead-grey; imparting a pale green tint to 
the blow-pipe flame : Molybdenite. | 
Mica :—In laminar or scaly masses, with a false pearly-metallic 
aspect. Colour, various; streak, white. See Section D. 4. 
Graphite :—Chiefly in black or dark-grey foliated masses or small 
scales. Feels somewhat greasy ; marks on paper ; sectile, and flexible 
