350 
Tin * 
th!ird species. 
Cornish Tin-Ore, or Wood-Tin, 
Kornisch Zinnerz Werner* 
Mina (PEtain mamelonnee, ou en Stalactites, Rom. de L. t. 3. p. 
428.> — Kornisch Zinnerz, Werner , Pabst. 1. b. s. 183.— 
Wid. s. 877. — Wood Tin-Oore, Kirw. vol. ii. p. 198. — Etain 
limoneux, De Born. t. 2. p. 248.< — Kornisch Zinnerz, Emm. 2. 
b. s. 427.— Mine cPEtain ferrugineuse, Lam. t. 1. p. 281.— 
Etain oxide concretionne, Hauy, t. 4. p. 147.— La Mine d’Etain 
grenue, ou PEtain grenu, Brack, t. 2. p. 340. — Holzzinnerz, 
Reuss } p. 4. s. 300® 
External Characters . 
Its most common colour is hair-brown, of different de- 
grees of intensity, which passes into wood-brown, and 
nearly into yellowish-grey, sometimes into reddish-brown. 
In single pieces it is sometimes striped. 
Occurs usually in rolled pieces ; sometimes we can ob- 
serve its original shape, which appears to be small reni- 
form ; and with impressions. 
The kidney-shaped or reniform is black on the surface, 
and bears a considerable resemblance to hematite. 
Externally glistening. 
Internally it is glistening and glimmering, and its lustre 
is resinous, inclining to adamantine. 
Its fracture is delicate, straight, scopiform and stellular 
diverging fibrous. 
Fragments wedge-shaped and splintery. 
It occurs usually in large and coarse granular distinct 
concretions, which are intersected by curved and thin 
lamellar concretions, and the colour delineation is in the 
direction of the latter. 
The streak is shining and yellowish-brown. 
Is opaque. 
