The world’s most expensive marbles used to plan the Dambusters raid have sold for $19,748. Bouncing-bomb creator Barnes Wallis used the two glass balls in his back garden to calculate trajectory.
In Uruguay, Renato sets off an explosive to reveal an ancient, glittery stone: amethyst. In Italy, Enrico cuts slabs off of one of the most expensive marbles in the world: Calacatta. Stones, salts, ...
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