Australian Museum Journal Mineralogical notes. 1. Precious opal from White Cliffs, N.S.W. 2. Basic sulphate of iron from Mount Morgan
- Shortform:
- Cooksey, 1896, Rec. Aust. Mus. 2(7): 111–112
- Author(s):
- Cooksey, T.
- Year published:
- 1896
- Title:
- Mineralogical notes. 1. Precious opal from White Cliffs, N.S.W. 2. Basic sulphate of iron from Mount Morgan
- Serial title:
- Records of the Australian Museum
- Volume:
- 2
- Issue:
- 7
- Start page:
- 111
- End page:
- 112
- DOI:
- 10.3853/j.0067-1975.2.1896.1213
- Language:
- English
- Date published:
- 31 January 1896
- Cover date:
- 31 January 1896
- ISSN:
- 0067-1975
- CODEN:
- RAUMAJ
- Publisher:
- The Australian Museum
- Place published:
- Sydney, Australia
- Digitized:
- 11 September 2009
- Reference number:
- 1213
- EndNote package:
- EndNote file
- Title page:
- Title page (108kb PDF)
- Complete work:
- Complete work (319kb PDF)
Abstract
1.Precious opal from White Cliffs, NSW.
On examining a cut and polished specimen of a fossil-bearing ferruginous sandstone boulder from White Cliffs, N .S. Wales, I was struck by the appearance of the precious opal which had replaced the carbonate of lime of the shells. The rock is permeated with the opal, and particularly when polished has a very beautiful appearance. The minute surfaces in the interior of the opal which produce the play of color; when viewed with a lens, appear to be quite flat and terminated by perfectly straight edges often parallel.