The two men are standing in the middle of the sun-bleached South Australian outback, hunting for opals, the rare gemstones that can sparkle with a rainbow of different colours. They sift through ...

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 ...

The acclaimed London Gem and Mineral Show will takeover Sandown Park Racecourse this weekend The UK’s biggest gem and mineral ...