Boulder Opal

SiO2·nH2O
Also known as
  • Queensland Opal
Variety of
Precious Opal
Precious OpalSiO2·nH2O

Where it forms, where it's found

7recorded occurrences
Source · OpenStreetMap

Varieties

Synonyms

  • Queensland Opal

Literature, links & citation

Citations
  1. 1971Jones, J. B., Segnit, E. R. (1971) The nature of opal I. nomenclature and constituent phases. Journal of the Geological Society of Australia, 18 (1) 57-68 doi:10.1080/00167617108728743DOI: 10.1080/00167617108728743
  2. 1994Elzea, J.M., Odom, I.E., Miles, W.J. (1994) Distinguishing well ordered opal-CT and opal-C from high temperature cristobalite by x-ray diffraction. Analytica Chimica Acta, 286 (1). 107-116 doi:10.1016/0003-2670(94)80182-7DOI: 10.1016/0003-2670(94)80182-7
  3. 1996Lapis Extra No. 10, Opal (1996).
  4. 2008Kostov, Rusian I. (2008) Orphic Lithica As A Source Of Late Antiquity Mineralogical Knowledge. Annual Of The University Of Mining And Geology “ST. Ivan Rilski”, 51 (1) 109-115
Cite this entry
@misc{mineral2026,
  author    = {Mineral Index editorial board},
  title     = {Boulder Opal — Mineral Index},
  year      = {2026},
  url       = {https://mineralindex.org/minerals/boulder-opal-8000},
  note      = {Accessed 2026-05-11}
}