BISMUTH MINERALS, MOLYBDENITE & ENHYDROS — LIVERSIDGE. 33 



NOTE ON SOME BISMUTH MINERALS, MOLYBDENITE, 

 AND ENHYDROS. 



By a. Liversidge, M.A., F.R.S., Prof, of Chemistry, University 



of Sydney. 



[Plates VIII. IX. X.] 



The minerals mentioned in the following short note form part of 

 a collection recently purchased by the Trustees of the Australian 

 Museum ; some of them are of unusual interest, hence it was 

 considered desirable to draw attention to them in the pages of the 

 " Museum Records." The numerals simply indicate the different 

 specimens examined and described, those which are of the ordinary 

 character and from well known localities are not mentioned in 

 this paper. 



Native Bismuth. 



1. Some of the bismuth is in the massive condition, and is 

 similar to specimens already described in the "Journal of the Royal 

 Society of New South Wales," 1891, other specimens show it in 

 the form of acicular crystals running through rock crystal. The 

 massive bismuth is associated with quartz, both crystallised and 

 massive, sulphide of bismuth, bismuth ochre, galena, the latter 

 argentiferous, iron pyrites passing into ferrous sulphate, wolfram, 

 molybdenite and tin stone. From Kingsgate, Glen Innes, N.S.W. 



2. The acicular crystals in one case are two to three inches 

 long and of about the thickness of a horse hair, these completely 

 penetrate the rock crystal in much the same way as we often see 

 acicular fibres of rutile ; the characteristic colour, metallic lustre 

 and cleavage of the metal being, however, well shown. This 

 appears to be an unusual mode of occurrence for bismuth. 

 Kingsgate. 



3. Accompanying the fibres of the metal are small scattered 

 crystals or specks of the metal, together with small columnar 

 crystals. Kingsgate. 



4. Native bismuth in quartz from Tingha, N.S.W. 



5. Native bismuth, from Kangaroo Hills, Queensland. Asso- 

 ciated with chlorite, quartz, and red oxide of iron or gossan. 



