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.

Opals are formed when water and silicon dioxide ... Rubies can be exceptionally expensive. One ruby, weighing 25.59 carats ...

Global demand for opals is soaring, pushing up prices of the gemstones. As the 40ft (12m) drill rattles down through the red dirt, miner Craig Stutley makes a statement that sounds a lot like what ...

Essence's Lash Princess mascara has over 170,000 5-star reviews for dramatic length and volume without clumps, and tons of ...

Price hikes alone don’t show the full picture. As they increased, the cost of borrowing money also got more expensive because the Federal Reserve raised the fed rate in an effort to curb inflation.

The Australian Opals returned to the Olympic podium for the first time in 12 years, summoning a heroic effort against Belgium in the bronze medal game. After back-to-back disappointments in Rio ...

Opals skipper Tess Madgen has gone out on a high, announcing her retirement from basketball after a leading Australia to a bronze medal at the Olympics. Madgen played for the national team for ...

The Opals have advanced to the women's basketball knockouts and avoided the USA after a dramatic win over France, Meanwhile, the Kookaburras crashed out against old foes the Netherlands ...

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 ...