Following is a transcript of the video. 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.

Do you often hesitate to buy gemstones online? We get you. Buying gemstones can be overwhelming. The questions around gem authenticity, certification and value can be bit too much for buyers, ...

There’s something special about opals — several things, to be exact. Every opal is unique due to variations in flashes of color and patterns. And the shade of the opal can change based on the lighting ...