OCCUERING IN TASMANIA. 23 



23 DuFREYNOYSiTE. — (Sulpharseuite of lead.) 

 Analysis : — 



100-52 



Occurs in thick orthorhombic ciystals, which are 

 deeply grooved longitudinally, colour lead-grey, 

 highly polished, and implanted on and in the 

 cavities of crystalline siderite. Many of the beauti- 

 fully developed crystals exceeded 1 ^^ in length and 

 ^" in width. Locality, Block 291, North-East 

 Dundas. 



24 El^olite. — {Orthosilicate of sodium, potassium, and 



aluniiniu7n .) 



Occurs as a constituent in the eljeolite syenite of 

 Port Cygnet. 



25 Epidote. — (Basic silicate of calcium, alu7niniu7n, and 



iron.) 



Occurs very well crystallised and of good colour on 

 the Melba Flat, North Dundas. (H. W. Judd.) 



26 Evans ITE. — (Basic phosphate of cdwminium.) 



Analysis of this mineral from Zeehan, by Mr. H. G. 

 Smith. (Proceedings Koyal Soc, N.S.W., 1895.) 



P2 O5 =18-11 

 Al, O3 = 40-19 

 H; O =41-27 



99-57 



27 GiLBERTiTE. — (Variety of potassium mica.) 



Of a yellow to green colour and glimmering lustre 

 with tin ore in granite. Mt. Eex Mine, Ben Lo- 

 mond, Anchor, Liberator, and other mines, Lottah. 



