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TRANSACTIONS OF THE 



SECOND ORDER— PYRITES. 



Metallic lustre. Color red, yellow,* white or light 

 gray. 



H. from 1 to 8|. Brittle, not ductile. 

 G. from 3 to 7, 8, as in prismatic nickel pyrites, Jam. 

 hexahedral and rhomboidal iron pyrites, Jam. 

 and silver white cobalt. 



When of a gray color, H. 5 and more, as in 



nickeliferous gray antimony, Jam. 

 H. from 3 § to 5 : G. less than 5, 5, as in va- 

 riegated copper or phillipsite, and soft iron 

 pyrites, Br. 



THIRD ORDER— METALS. 



Perfect metallic lustre 5 color red, yellow, white or 

 light gray. 



Tesseral and hexagonal. 

 H. from 0 to 8| : ductile or malleable. 

 G. from 5, 8 to 22. 



Examples — octahedral copper, hexahedral gold, 

 octahedral palladium, native platina and iri- 

 dosmine, Br* 

 Tesseral : without cleavage, or G. 7, 4 and more, 

 as native silver and native amalgam. 



* What, some authors call torabas-browrij belongs yet to bronze yellow 



