XICKELIFEROUS GREY ANTIMONY. 131 



rhombohedral Quartz, and accompanied by hexahedral 

 Gold, and several species of the orders Malachite, Glance, 

 and Pyrites. 



NEPHBITE. 



Nephrite. JAM. Syst VoL III. p. 287. Man. p. 327. 

 Nephrite. PHILL. p. 134. 



Massive: composition impalpable. Fracture coarse 

 splintery, in some varieties slaty in the great. 



Colour green, particularly leek-green passing into 

 grey and white. Translucent, often only on the 

 edges. 



Not particularly brittle ; some varieties are remark- 

 ably tough. Hardness = 7'0. Sp. Gr. = 2-932 

 ... 3-024, BREITHAUPT. 



Alone it is infusible before the blowpipe, but becomes 

 white. It consists, according to KASTNEH, of 



Silica 50-50. 



Magnesia 31-00. 



Alumina 10*00. 



Oxide of Iron 5-50. 



Oxide of Chrome 0-05. 



Water 2-?o. 



It is brought from China and Egypt. A large block has 

 lately been found in the alluvial soil of the alum-earth 

 mines at Schwemmsal in Saxony. 



NICKELIFEEOUS GREY ANTIMONY. 

 PYRITES. 



Nickeliferous Grey Antimony. JAM. Syst. Vol. III. p. 

 403. Man. p. 327. 



Tessular. Cleavage, hexahedron, perfect. Mas- 

 sive : composition granular. 



