77 



Smohy quartz, — Fine specimens are obtainable at tbe "Wal- 

 laroo Mine, and it occurs at Angaston and Mount Crawford. 

 Burr also notes it at the Belvidere Eange. 



Milky quartz occurs at the Wallaroo Mine, and Tate reports 

 it at the springs at the Peake, Central Australia. 



Bronze-coloured crystals (the colour due to a thin coating of 

 ferric oxide) occur at the Stanley Mine, and also at Emu Flat, 

 near Clare. 



Chalcedony occurs at Eedruth, AVallaroo Mine, Angaston, 

 and at North Para near G-awler. Tate reports it at the Peake, 

 Central Australia ; in the Miocene cliffs at the mouth of the 

 Onkaparinga ; and as fossil casts at Ardrossan. Burr names 

 it as occurring at Plaxman Valley, Mount Barker, Barossa 

 Bange, and near the Kapunda Mine. 



Oarnelian is reported by Tate at Stuart Creek, Central 

 Australia. 



Heliotrope is reported by Tate at Stuart Creek. 



Agate pebbles are to be found at Stuart Creek, near the 

 Charlotte Waters ; and at various other places in Central 

 Australia ; near the Katherine Telegraph Station. Also, ac- 

 cording to Burr, at Flaxman Valley. 



Silicious sinter occurs at Angaston, and, according to Burr, 

 at the Barossa Eange and Mount Barker. 



Flint. — Tate reports this variety in the older Tertiary rocks 

 of Mount Gambler, MacDonnell Bay and Bunda Cliffs. Burr 

 also mentions it as occurring in the form of nodules on the 

 beach at Eivoli Bay. 



Hornstone occurs at the Crinnis Mine, and Burr indicates 

 the following localities for this variety : — Barossa Eange, 

 Plaxman Valley, and 25 miles north-east of Adelaide. 



Jasper occurs at Stuart Eange, at Greenock, Ardrossan, 

 and Burra Eange. Tate also reports it at Angaston, and near 

 •the Peak, Central Australia, and Burr in the Barossa and 

 Belvidere Eanges. 



Opal. 



Var. JPrecious Opal. — There is good reason for believing that 

 this variety exists in the colony. It is found in Queensland 

 near the South Australian border, and I have seen specimens 

 which were said to have been discovered just within the border, 

 the locality doubtless being that given by Tate, viz. : — Inna- 

 mincka, Cooper's Creek. 



Girasol. — I have met with a specimen of this variety from 

 near Arkaba, Par North. 



Common opal occurs at Angaston and at Mount Crawford in 

 all varieties of colours — notably milk-white, green, yellow, 

 blue, resin-opal and honey-opal. It also occurs at Nuriootpa 



