The most colorful gemstones on Earth - Jeff Dekofsky
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What gives opals their signature shimmering colors? Dig into the science of the gemstone s formation, millions of years in the making.
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…
Source: TED-Ed (2020-12-07)