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.

Regardless of luckiness, the mineraloid gemstone — whether it be of the black, white ... and differences and pros and cons of synthetic versus natural opals. What's the difference between ...

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 ...

oil men accepted it as a fact, that Chemist Audibert of Paris had succeeded in making synthetic petroleum ... and the usual by-products of that “black gold” which nature only makes after ...

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.

(Supplied: Liz Smith) In the meantime, Bob was experimenting with macrophotography, capturing the opals and fossils that miners brought to them. "Black opal is the most amazing gemstone on the ...

Risk Disclosure: Trading in financial instruments and/or cryptocurrencies involves high risks including the risk of losing some, or all, of your investment amount, and may not be suitable for all ...

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

At the lower end of the market, Pembient is hoping to inject a level of quality uncertainty into the market, so that people begin to question whether wild or synthetic horn is being traded in the ...

Synthetic biology is the design and construction of new biological parts, devices, and systems, and the re-design of existing, natural biological systems for useful purposes. Researchers have used ...

For instance, groups poorly represented in the base data will be so in the synthetic data. “The problem is, you can only do so much,” Keyes said. “Say you only have 30 Black people in a dataset.

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 ...