In Uruguay, Renato is setting off an explosive to reveal an ancient, glittery stone — amethyst. While in Italy, Enrico is cutting slabs off of one of the most expensive marbles in the world — Calacatta.

Stones, salts, crystals, and other natural resources are worth millions of dollars. But getting to them is no easy feat. All over the world, miners are setting off on dangerous and strenuous missions on mountain tops, in underground tunnels, and below the seas to excavate these precious resources.

Our first stop is Scotland, where experienced stonemasons turn a rare granite into Olympic curling stones worth over $600 apiece.

00:00:00 - Intro
00:00:58 - Curling Stones
00:09:36 - Sulfur
00:21:48 - Pink Himalayan Salt
00:26:27 - Calacatta Marble
00:34:18 - Opal
00:40:41 - Tin Floating Mines
00:53:11 - Coal
01:03:54 - Amethyst
01:15:32 - Smithsonian Crystal
01:26:43 - Meerschaum Pipes
01:35:11 - Benitoite
1:42:29 - Credits

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11 of the Most Dangerous and Expensive Mining Expeditions in the World