Opal and ironstone “Yowah nut” concretion - image 1

Opal and ironstone “Yowah nut” concretion

D

Deborah Decker Roman
0 for sale
Opal and ironstone “Yowah nut” concretion, 5 cm, from Yowah Opal Fields, Queensland, Australia. Photo by Jeff Scovil.

Product details

Species
OpalAbout Opal →
SizeMiniature
Dimensions5.0 cm
Added on02/13/2026
Locality
Australia, Queensland
Publications
  • Mineralogical Record Mineral Collections In American Midwest page 198

Learn more

Opal
Mineral guide
Learn about Opal
amorphous silica with water and a spectacular play-of-color; black, boulder, and fire opal varieties capture brightness, color, and collecting appeal.
Regional guide
Opal from Queensland
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