BY J. STEWART BERGE, ETC. 65 



Reference No. 



150a. In the Chillagoe Caves every possible variety can 



be found, except Iceland Spar, and in some 

 places, as at Red Hills, the calcite is almost 

 pure enough to be called Iceland Spar. 

 Varieties of calcite found at Chillagoe, are : — 



151. ] hiji tootJi .sjJdf. 



152. Sat in sptir. 



153. (riduuhtr liyncsUinc, 



154. (\niipiiet limestone. 



155. Stalactite. 



156. Stalatftnite. 



157. Fluorite. — Fluorspar — Fluoride of ealciuiu. 



Occurs at Girofla, Newellton, Herberton, Baker- 

 ville, Eureka Creek, and Dargalong. It is not 

 as conmion as might be expected. 



158. Aragonite. — 



Common through the alteration of calcite rhombs, 

 Chillagoe, Newellton, etc. 



159. Dolomite. — 



California Creek. 



Some of the Chillagoe limestone seems to be 



sufficiently impregnated with magnesia to 



become dolormite. 



160. Gypsum — Lime suljihate. 



Not uncommon in the Chillagoe district, the more 

 frequent crystals being twin forms of selenite, 

 due to secondary decomposition. 



Varieties of gypsum found are : — 



161. Alabaster, 



162. Sehmite, 



163. Plumose, and 



164. Fih roils. 

 ScHEELiTE {see Tungsten). 



165. Anhydrite — Ijjdrous lime sulphate. 



Found with gypsum. 



166. Apatite — ('ahimii Phosphate. 



Occurs in the granite rocks of the district in 

 microscopic quantities. 



Another variety occasionally occurs as efflores- 

 cences at Wandoo Creek, Chillagoe. 



E 



