109 



TAB. CCCLIX. 



CUPRUM sulphureum. 

 Subsulphuret of Copper ,or Vitreous Copper Ore, 



Class 3. Metals. Order 1; Homogeneous. 



Gen. 12. Cuprum. Spec. 4. Subsulphuret. 



Syn. Vitreous Copper Ore. Kirw. 2. 144. 

 Kupferglanz. Emmerl. 2. 222. 

 Cuivre Suifure. Hauy, 3. 55 i. 



This is one of the richest Copper Ores, and is very abun- 

 dant in Cornwall. Its crystals usually partake of the hex- 

 aedral prism. Thus we have very short truncated hexaedral 

 pyramids placed upon very short six-sided columns, with 

 many varieties on the same specimen. 



The present specimen at one end has these crystals mac- 

 kled, which I suspect has not been mentioned before : see 

 the rigid hand figure, which consists of two crystals like the 

 middle one joined together. Some of the crystals on the 

 specimen approach the cross, like the left hand figure. I 

 have a good specimen, with many nearly such, but did not 

 think it necessary to give the whole. The one here figured 

 ,came from Cooks-Kitchen, Cornwall. 



