OPAL Fuels Inc. (OPAL) came out with quarterly earnings of $0.09 per share, missing the Zacks Consensus Estimate of $0.18 per share. This compares to loss of $0.01 per share a year ago. These figures ...

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.