looking for opals around the mouth of an opal mine (noodling)I found an aboriginal stone cutting implement made from petrified wood. The implement,4 x 2cm, has clearly marked brown and auburn wood ...

Narrator: High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones. But mining black opal isn't easy. After investing tens of thousands of ...