Opalised shark teeth fossils have been discovered in New South Wales. It's very rare that organisms become fossils and even rarer that they become opals. Find out how 👇 | ABC Landline

Finding a shark tooth along a beach can be both exciting and fascinating. Is the shark still alive, what species is it, how long was it? When the tooth you find is at least 10,000 years old, and comes from a great white, that’s another story entirely! That is what happened to Oliver and Sebastian Martinez recently on Narragansett Beach in RI. Beachcombing with their mom, Lauren, after a big storm, they found this gorgeous fossilized great white tooth. Dr. Josh Moyer from the Atlantic Shark Insti