This rare and valuable Australian opalized shell is an exceptional geological and paleontological find, formed within natural cavities in rock. These cavities originated when parts of ancient organisms were buried in sand or clay, gradually fossilized, and later transformed into opal through mineral replacement.
Although fossils from the age of the dinosaurs are relatively uncommon in Australia, the continent was once submerged beneath the Eromanga Sea—a shallow inland sea that covered nearly one-third of the landmass during the Cretaceous period.
These particular specimens are believed to date from the Paleocene (approximately 66–56 million years ago) to the Eocene (56–33.9 million years ago), marking them as both historically significant and exceptionally rare.
- Weight: 31.20 ct = 6.24 gr
- Size: 23 x 24 x 19 mm
