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.

Serve the drink immediately to enjoy it at its best. The Black Opal is best served cold, with the icy mix adding to the ...

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 ...

The best way to farm experience and camos in Black Ops 6 Zombies is to enter a match using the new Directed Mode, which ...

(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 ...