NOVA

Treasures of the Earth: Gems

Season 43 Episode 18 | 54m 1s Video has closed captioning.

Their beauty has captivated us for millennia. Their cost can be extraordinary–some are even considered priceless. Precious gems like diamonds, rubies, emeralds, opal, and jade are the ultimate treasures of the earth, and each one is made from a specific–and often torturous–recipe of chemistry, pressure, and heat. The secrets to their sparkle, color, and even strength lie deep inside the gems.

Aired: 08/16/18

Expired: 10/09/19

Rating: TV-PG

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