Opal from selected localities.
New Zealand | |
| Moore, C.R. (1979) Geology and mineralisation of the former Broken Hills gold mine, Hikuai, Coromandel, New Zealand. New Zealand Journal of Geology and Geophysics, 22:3, 339-351. |
| R. Martin. Tairua Essence of Microscope, 2009 |
[var: Common Opal] Collection of RJ Martin |
4th Branch, Tairua River, Hikuai, Thames-Coromandel District, Waikato Region, New Zealand