SYNONYMES, AND PRIMARY FORMS. 463 



crystallised. An octahedron with a square 



* P on P', 102 14' ; P on P", 125 15'. 

 mamellated. 

 amorphous. 



purple Copper; Buntkupferez. Differing from 

 yellow copper in the proportions of its 

 constituent elements. 

 crystallised. A regular octahedron^ as deter- 



mined hy W. P. from cleavage. 

 amorphous. 



of Copper and Antimony. 

 ..... of Copper, Iron, and Antimony. Colour, dark 



..................... . . < . Arsenic. Colour, bright 



steel grey. 



Both these varieties are termed Grey 

 copper; Fahlore. 



crystallised. A regular tetrahedron. 

 amorphous. 



Platiniferous grey copper. 

 ........ of Copper, Iron, and Arsenic, but differing in 



the proportions from the preceding. 

 Tennantite. 



crystallised. A regular tetrahedron. The regular 

 octahedron is considered as the primary 

 form by Mr. W. Phillips, but some of the 

 modifications accord better with the 

 tetrahedron. 

 undetermined species. 

 blue fibrous Velvet ore ; Sammterz. 

 green foliated ; Kupferschaum. 

 Corallenerz, see Mercury, sulphuret^ hepatic. 

 Cordierite, see Dichroite. 

 CORUNDUM. 



blue ; Sapphire ; Telesie. 

 red; Oriental ruby ; Telesie. 

 yellow ; Oriental topaz. 

 purple ; Oriental amethyst. 

 common ; Adamantine spar. 



crystallised. An acute rhomboid, P on P', 86 4'. 

 granular. 

 compact. 



ferriferous; Emery. 



COUZERANITE. The crystalline form is said by Leonhard to 

 be aright rectangular prism. 



