MINF.nAI.OfJirAr, NOTF.S ANr>F,l!SON. 



oolour aro not magnetic and readily dissolve in concentrated l,ydrochlonc 

 acid, ti,e solution reacting for both ferrous and ferric iron. 11ns crust .s 

 nerlmpsa mixture of magnetite and hematite. Ihe crystals ol cupnte 

 are ockhedral in liabit and generally small, the largest measuring about 

 5 mm in the axial directions, and tlie faces are in general smootli and 

 brilliant The variety chalcotrichite was formerly of common occurrence 

 at Cadia but it does not seem to be found in the present workings. The 

 forms identified are the cube, the octahedron, the dodecahedron, and a 

 new trapezohedron / (544) which was observed seven times on two 

 crystals. 



Cloncairy, Queensland. 

 (PI. viii., fig. 2.) 

 The hand specimen on which the figured crystal was obtained is 

 composed mainly of massive cuprite and crystalline native copper. 1 he 

 crystals of cuprite are cubic in habit, measure up to 4 mm. along tlie 

 cube edges, and are brownish red in colour ; the only forms present are 

 the cube, dodecahedron, and octahedron. 



