Opal from
Australia | |
| Wray, R.A.L. (2001): Alunite formation within silica stalactites from the Sydney Region, South-eastern Australia. International Journal of Speleology 40, 109-116. |
| Sorrell, Steve (n.d.) Personal communication. |
|
Australia | |
| Wray, R.A.L. (2001): Alunite formation within silica stalactites from the Sydney Region, South-eastern Australia. International Journal of Speleology 40, 109-116. |
| Sorrell, Steve (n.d.) Personal communication. |
|