The most colorful gemstones on Earth

Video source record: https://www.ted.com/talks/jeff_dekofsky_the_most_colorful_gemstones_on_earth

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Summary

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 v

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Details

• Source collection: Wikivideos
• License: CC / Public Domain
• Category: Space

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Academic references

1. Primary source record: https://www.ted.com/talks/jeff_dekofsky_the_most_colorful_gemstones_on_earth
2. Topic lookup: Google Scholar search for “The most colorful gemstones on Earth”