206 



RECORDS OF THE AUSTRALIAN MDSEnM. 



and compaiatively small, the largest measuring about five mm. along the 

 cube edge. The crystals are chiefly cubes modified by narrow faces of the 

 pyritoliedron (210) and minute faces of the octahedron (111) and the 

 diploid (213). A few of the crystals are pyritohedral in habit, but are 

 poorly developed. This specimen, like the others mentioned below, was 

 obtained at a depth of about 200 feet (the " intermediate stope "). The 

 remainder of the collection consists of smaller hand specimens, in which 

 the pyrite is accompanied by sphalerite, anglesite, and quartz. Mr. Combe 

 also showed me a specimen of copper sul[)hate which he had found in a 

 small vugh a little higher up. Pyromorphite in simple hexagonal crystals 

 tei'minated bj- the basal plane is also found at this mine. 



Forms and angles: — 



GARNET. 



Broken Hill, N.S.Wales. 



(PI. xl., fig. 5.) 



At Broken Hill garnet occurs in the garnet-sillimanite-gneiss, in the 

 garnet-sandstone, Avhich is closely associated with the ore deposits, and in 

 the ore itself, where it is accompanied by galena, sphalerite, and rhodonite. 

 It appears that the garnet of the garnet-sandstone and the lode is the 

 manganese variety spessartite, a fact which was, I believe, fii'st pointed 

 out by Mr. D. A. Porter.^ Professor E. "W. Skeats^ has examined sections 



» Porter— Journ. Ecy. Soc. N.S.Wales, xxviii., 18'. 4 (^1895), p. 4J ; cp. Trans. 

 Aiistr. Inst. Min. Engfineers, xv„ Ft. I.. 1911, pp. 185-188. 



« Skeats — Trans. Austr. Inst. Min. Engineers, loc. cit., p. 186. 



