How to MINE OPAL gems in the OUTBACK - Smarter Every Day 164 ─ SmarterEveryDay

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The majority of the world's opal gemstones used for jewelry comes from Coober Pedy Australia:
https://en.wikipedia.org/wiki/Coober_...

Opals are unique:
https://en.wikipedia.org/wiki/Opal

Yanni's Store and Museum:
http://www.umoonaopalmine.com.au/

Opal can be created by plants!
http://www.sciencedirect.com/science/...
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