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The most colorful gemstones on Earth - Jeff Dekofsky

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TEDEd Animation

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In November 1986, Australian miners climbed Lunatic Hill and bored 20 meters into the Earth. They were rewarded with a fist-sized, record breaking gemstone, which they named the Hailey’s Comet opal. Thanks to a characteristic called “play of color,” no two opals look the same. So what causes these vibrant displays? Jeff Dekofsky digs into the rock’s shimmering, dancing displays of light.

What optical phenomena is responsible for opals play-of-color?

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Meet The Creators

  • Educator Jeff Dekofsky
  • Director Ivana Bošnjak, Thomas Johnson Volda
  • Narrator Jack Cutmore-Scott
  • Sound Designer Spencer Ward
  • Music Salil Bhayani
  • Director of Production Gerta Xhelo
  • Editorial Director Alex Rosenthal
  • Producer Bethany Cutmore-Scott
  • Script Editor Emma Bryce
  • Fact-Checker Jennifer Nam

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