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Treasures of the Earth: Gems
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Gold, bronze, iron, steel... metals are pillars of our civilization, but what makes them...
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NOVA  ·  Episode 4318

Treasures of the Earth: Gems


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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