IRON PYRITES. 
.39 
200. Iron Pyrites, massive, 
with dark Calcspar. 
Cae Coch Gwan, Gwychjr Eatate, 
North Wales. 
Shelf II. 
201. Iron Pyrites, cnbically 
' crystallized. 
Huel Unity, St. Agnes, Cornwall. 
202. Iron Pyrites, in compo¬ 
site forms, crystallized upon vein- 
quartz. 
Cornwall. 
203. Marcasite, (Rhombic or 
White iron Pyrites), in compound 
crystals. 
Lisheard, Co7'nwall. 
204 & 205. Marcasite, 
Cockscomb ” Pyrites), well crys¬ 
tallized. 
Vii'tuous Lady Mme, near Tavi¬ 
stock, Devorishire. 
206. Marcasite, (“Cockscomb” 
Pyrites.) 
Greyhound Pit, Swansea Valley, 
South Wales. 
207. Marcasite, crystallized 
on Quartz. 
Nant-y- Creiau, Cardigansh ire. 
Presented by TV. W. Smyth, P.R.S. 
207a. Marcasite, crystallized. 
Back of the lead lode, Penrhiw 
Lead Mine, near Aberyslwith, 
Cardiganshire. 
207b. Marcasite, crystallized. 
Weardale, Durham. 
208. Iron Pyrites, in globular 
concretions occurring in a seam of 
Coal. 
Shelf III. 
209. Iron Pyrites, with natu¬ 
rally polished surface called “ slic- 
kensides.” 
From the side or “ wall ” of a 
fault. 
210. Iron Pyrites, in small 
cubes imbedded in Slate rock. 
Near Pont Erwyd, between Aher- 
ystwith and Pkayader, Cardi¬ 
ganshire. 
211. Iron Pyrites, in octohe- 
dral crystals. 
Weston, near Bath, Somersetshire. 
Presented by G. B. Greenough, P.R.S. 
212. Iron Pyrites, crystalline, 
spherical. 
Lyme Regis, Dorsetshire. 
Presented by G. B. Greenough, P.R.S. 
213. Iron Pyrites, a nodule 
externally crystallized: said to 
contain gold, and caused much 
mining excitement in the county 
(Derbyshire), 1853-4, but on 
analysis is found to contain no 
sensible quantity of gold. 
Presented by Ph. Hubbersty. 
I 214. Crystal of Iron Pyrites, 
j peculiarly distorted combination 
i of cube and pentagonal dodecahe- 
1 drou. 
i Percy Main, Newcastle. 
i Presented by G. B. Greenough, P.R.S. 
215. Iron Pyrites, casts on 
cubes. 
From a lead lode, Aldstone, 
I Cumberland. 
j Presented by G. B. Greenough, P.R.S. 
I 216. Iron Pyrites, detached 
i crystals in cubes, and pentagonal 
I dodecahedrons. 
j Virtuous Lady Mine, Tavistock, 
\ Devonshire. 
i 217. Iron Pyrites, complex 
i crystals strung as a necklace. 
217a. Iron Pyrites, irregularly 
j crystallized in cubo-octohedrons. 
I 
i 218. Iron Pyrites, crystal- 
I lized in nodules. 
I From the Chalk Maid, Dover 
I Cliff, Kent. 
I Presented by J. S. Bo’vr^'bank. 
' 218a. Iron Pyrites, the^mine- 
I ralizing material of an Ammonite, 
j Whitby. 
j 219. Yiyianite, {Phosphate of 
iron), in columnar diversfin^: crvs- 
tals. 
I Fduel Jane, Kea, Cornwall. 
; 220. ViviANiTE, radiated, on 
! Iron Pyrites. 
J From the same Mine. 
