( 



166 



Outlines of the Minemlog-^ and Geology 



it from Schaalstoae.* From these circumstances, we have ven- 

 tured to place it as a subspecies of Schaalstorie, and from its local- 

 ity, have denominated it CJielmsforditc, It has been shown to 

 several distinguished mineralogists in this part of our country, 

 who were unacquainted with it, but should it ultimately prove 

 to be Schaalstone, we shall feel ourselves more happy, in having 

 discovered a new locality of this very rare mineral, than in add- 



^ 



ing a new subspecies. 



SPECIES Xlh-^TBEMOLITE. 



Variety I. — Common Tremolite, 



+ 



r 



Common Tremolite, Ckavelandy p. 523. Idem, Jameson^ vol. u p. 466 

 Bladed Tremolite, MkxUy^. 234. 



jEo^ternal Characters, 



Its colours are white and g 



Of 



9 



g 



and greyish white 5 and of green, pale asparagus green, and 



■i 



bluish green. 



Its lustre is glistening and glimmering, and is pearly. 



It is translucent at the edges, passing into semi-transparent. 



t s amorphous. 



The streak is whitish. 



It is soft, but sufficiently hard tc slightly scratch glass. 



The structure is coarse parallel ibrous, passing to imperfectly 

 foliated 5 the longitudinal fracture is splintery, and the cross frac- 

 ture is uneven. 



* " It is named Schaalstone, which in German intimates that it is composed 

 of lamellar distinct concretions." Jameson, toI. i. p. 5£0. 



