How to MINE OPAL gems in the OUTBACK – Smarter Every Day 164

Please click here to try The Great Courses Plus: Click here if you’re interested in subscribing: Smarter Every Day on Patreon ⇊ Click below for more links! ⇊ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Thank you to Science Alert for arranging my travel! GET SMARTER SECTION The majority of the world’s opal gemstones used for jewelry comes from Coober Pedy…

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