l:]2 



clase, and the similar Canadian variety is Albite, although some of our 

 Orthoclase is quite luminous when cut. 



Orthodase occurs in Canada of different colours the more conspi- 

 cuous of which are pinkish, white and brown, the latter variety often 

 beautifully crystallized in the Townships of Sebastopol and Ross, 

 and sometimes the crystals when cut parallel with certain planes are 

 quite luminous. They at the same time, reveal minute spangles of a 

 glistening yellow colour, thus combining the properties of the Moon- 

 stone and Aventurine. This constitutes a neat and pretty gem, and it 

 is a pity that prejudice should prevent these stones i'rom taking the 

 place of the gaudy imitation trash that is at present glutting our market. 



It is stated in the Geology of Canada that a reddish-brown Ortho- 

 clase with cleavages of half an inch across, which exhibits golden-bronze 

 reflections of great beauty, was brought from the coast of Labrador. 

 Another Aventurine variety was noticed by Dr. Bigsby on the north 

 east shore of Lake Huron, twenty miles east of the French River. 



Porphyry, more properly is a rock mass, composed of two or more 

 minerals. This material of various colored bases, interspersed with 

 white, rose red, and greenish spots is found at n)any places in Canada. 

 A rock of this description covers a number of acres in Grenville and 

 Chatham, and could be utilized for ornamental purposes, and also, as a 

 gem stone, portions of it being as pretty as a Bloodstone. 



Felsite. I should here mention another rock that occurs at Cham- 

 cook, N.B., under the name of Felsite. It is thoroughly homogenous 

 and takes a high polish. Its colour is of various shades of brown, some- 

 times veined with lighter or darker shades, giving to the mass the aspect 

 of rosewood. 



Microcline or "Amazon Stone," is found in the Townships of Hull, 

 Wakefield, Sebastopol and in the neighbourhood of Paul's Island, 

 Labrador, of various shades of green, often verging on blue. This 

 stone from the neighbourhood of Wakefield when cut convexly often 

 reveals a bright, silvery lustre and in artificial light has a pretty effect. 



Perihite, is the name given by Dr. Thompson to a variety of Feld- 

 spar from the Township of Burgess, and according to Bauerman, is 

 made up of different laminae of Albite, Orthoclase and Microcline, the 

 latter being rendered iridescent by inclusions of Specular Iron. This 



