Treasures of the Earth: Gems

NOVA

2nd November 2016 55 mins Season 44 Episode 5

Gemstones like diamonds, rubies, opal and jade are the ultimate treasures. Delve into Earth's depths to discover how these precious stones are forged and what explains the unique allure of each captivating gemstone.

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Season 44 · Episode 6

Treasures of the Earth: Metals

Gold, bronze, iron, steel... metals are pillars of our civilization, but what makes them so special? Discover their unique properties and explore how our mastery of metals has led us from the stone age to today's hi-tech world.

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