This rare and valuable Australian opalized shell is an exceptional geological and paleontological specimen, formed naturally within rock cavities over millions of years. These cavities developed when ancient marine organisms were buried in sand or clay, fossilised, and later replaced by opal through a natural mineralisation process.
Opalised fossils are highly sought after due to their rarity and scientific significance. While dinosaur-age fossils are uncommon in Australia, much of the continent was once covered by the ancient Eromanga Sea, a vast inland sea that existed during the Cretaceous period and supported diverse marine life.
These opalised shell specimens are believed to date from the Paleocene (66–56 million years ago) to the Eocene (56–33.9 million years ago), making them both historically important and exceptionally rare collectibles.
Highly prized by collectors, lapidaries, and opal enthusiasts, this unique opal fossil represents a remarkable fusion of natural history and gemstone beauty.
Weight: 84.44 ct (16.88 g)
Size: 54 × 27 × 22 mm
