Collector’s drawer find traced to rare opalised dinosaur vertebrae

A Queensland opal collector has uncovered the history of a specimen he bought years ago for its look, only to learn it was part of a rare dinosaur fossil find from Winton. Certification now links the opal to a sauropod vertebra and has led to a trade that reunited related specimens.

Why it matters: - The certification connects a collector’s opal to Queensland’s prehistoric record and identifies it as part of a rare dinosaur fossil find. - The discovery adds scientific and historical value to a specimen that had long been treated as a decorative collectible. - Wayne Sedawie says he hopes the opal will eventually end up in an Australian museum for preservation and public study.

What happened: - Wayne Sedawie, founder of Opal Auctions, bought an unusual opal about five years ago because he liked its appearance. - Sedawie kept the stone in a desk drawer for years and believed it resembled opalised vegetation. - About a year ago, an opal miner from Winton saw the specimen and began making increasingly larger offers for it. - The miner later explained that his father, Bruno Tasic, had discovered a parcel of dinosaur fossil specimens in Winton about 30 years ago. - Sedawie’s specimen was apparently separated from that original discovery and later passed through an opal dealer before Sedawie bought it. - Sedawie arranged for the specimen to be examined by GSL Laboratories. - The certification was received last month.

The details: - GSL Laboratories described the material as opalised sauropod dinosaur fossil bone. - The certificate says palaeontologists identified the specimen as the opalised remains of a vertebra from a plant-eating sauropod dinosaur from the Winton Formation during the Cretaceous period. - The certificate documents analysis by Dr Andrew Rozefelds, Principal Curator at Queensland Museum. - The certificate references the Queensland Museum publication In Search of Ancient Queensland: Discovery Guide from 2014, including a page showing a macro image of the opal sold in Las Vegas. - The miner told Sedawie that only one other specimen from the discovery remained in the family’s possession. - That remaining specimen had been kept in the miner’s mother’s safe for many years. - The family still keeps one specimen as a memorial to Bruno Tasic. - Sedawie says he has sold hundreds of thousands of opals over his career, including some worth tens of thousands of dollars.

Between the lines: - The exchange shows how rare fossil material can circulate for years without its full provenance being known. - Sedawie’s account suggests the specimen’s significance was visible before its history was understood. - The trade also reflects collector networks that can reconnect separated pieces from the same find.

What's next: - Sedawie wants the specimen to find a permanent home in an Australian museum. - He expects the certification and family history to help preserve the story of the find for future generations. - The specimen may now be studied as both an opal and a documented prehistoric artifact.

The bottom line: - A piece once bought for its look has become a certified link to Queensland’s ancient past.