tin. 
347 
SECOND SPECIES. 
Tin- Stone. 
Zinnstein.™ Werner* 
Stannum Arsenico et Ferro mineralisatum, Wall. t. 2. p. 319, et 
seq.«— Zinnstein, Werner , Pabst. 1 . b. s. 171.-— Id. Wid . s. 880.— 
Common Tin»stone, Kirw. vol. ii. p. 197.— Etain vitreux, Dc 
Born. t. 2. p. 238.— -Zinnkeis, Emm . b. 2. s. 420. Oxide d'Etain, 
Lam. t. l.p. 274.— Etain oxide, Hauy, t. 4. p. 137.— La Pierre 
d’Etain, ou la Mine d’Etain commune. Brack , t. 2. p. 334,— 
Zinnstein, Meuss, 4. b s. 288. 
External Characters • 
Its most common colour is blackish-brown; from 
which it passes, on the one side, into brownish- black and 
velvet- black ; on the other side, into hair- brown and red- 
dish-brown, from which it passes further into yellowish-* 
green, yellowish-white, and greenish -white. 
Occurs massive, disseminated, in rolled pieces, in grains 
as sand ; but most frequently crystallized, and the crys- 
tals, which are four sided prisms, are in general very in- 
distinct 
The surface of the crystals is usually smooth, seldom 
more or less strongly streaked, and it is commonly splen- 
dent. 
Internally it is only shining and glistening, and its lus- 
tre is intermediate between resinous and adamantine, but 
more inclining to the latter. 
Fracture coarse and small-grained uneven, inclining to 
imperfect conchoidai ; seldom imperfect foliated, and ex- 
tremely seldom perfect foliated, and then it is highly 
splendent. 
Fragments indeterminately angular, pretty blunt-edg* 
ed. 
Vol. Ill, 
Hr 
