Once rough opal is extracted and processed from the dirt, it has to be cut and polished. This is when the real value of the gem is determined. There's a huge demand for black opal, with lack of ...

Discover why OPAL Fuels, a leading RNG producer, presents a buying opportunity with strong revenue growth and undervaluation, ...

The Price to Earnings (P/E) ratio, a key valuation measure, is calculated by dividing the stock's most recent closing price by the sum of the diluted earnings per share from continuing operations ...

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.

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