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.

The shinier the pearl, the better. Black opal is one of the rarest gemstones in the world, sought after for its seemingly infinite display of colors, compared to common opal, which is usually one ...

It was these drawbacks that led Stuart Semple to create his own incredibly black paint. Over the years, he’s refined the formula and improved its performance, steadily building a greater product ...

"Black opal is the most amazing gemstone on the planet," he says. "The images that come out of it, especially at magnification, are just totally unexpected." Sometimes this was the only chance to ...

Yet despite appearances there is a siren’s call here. The world covets opal but the most revered is black opal – a ...

Black holes are points in space that are so dense they create deep gravity sinks. Beyond a certain region, not even light can escape the powerful tug of a black hole's gravity. And anything that v ...

Soon enough, the pair, along with their tech-savvy friend Opal Tometi, director of the Black Alliance for Just Immigration, had lit up the Web with a plea to acknowledge—and fix—the ...

"Black people alongside our allies stood up to change the course of history and we won," said Alicia Garza. Garza and her BLM co-founders, Patrisse Cullors and Opal Tometi, spoke as part of the ...

Opal is not a common name ... I never could have dreamed that the first South Asian and Black vice president would be hosting Diwali at her home—a holiday I never wanted to celebrate growing ...

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.

Black holes are regions in space where an enormous amount of mass is packed into a tiny volume. This creates a gravitational pull so strong that not even light can escape. They are created when giant ...