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.

It is now among the world's most expensive cars. Rimac got the job ... All of this yields an all-wheel-drive rocket capable of hitting at least 275 mph, and traveling 35 miles on battery power ...