TAB. LXXX. 



STANNUM oxygenizatum, 

 . Oxygenized Tin. 





Class 3. Metals. Order I. Homogeneous. 

 Gen. 6. Tin. Spec. 2. Oxygenized Tin. 



Div. 1. Crystallized. 



Spec. Char. Combined with oxygen. 



Octaedral crystals of oxygenized tin, destitute of any 

 truncations, bevellings, or other modifications, I understand 

 have never been yet found ; those here represented are among 

 the nearest known to that simple figure. My friend Mr. 

 Richard Phillips, who possesses one of the finest and earliest 

 collections of tins, See. from Cornwall, lent me one of his 

 best specimens for this figure, and I am possessed of a 

 similar specimen. They seem in every thing so very like 

 each other, as readily to imply that they came from the 

 same place. They are very black, with much lustre, 

 lying in every direction ; some are. macled or transposed 

 with various truncations, bevellings, &c. The middle figure 

 at the bottom shows the most perfect octaedron I have 

 yet seen. The edges of the pyramids are truncated more 



o 



