Roughly 95% of the world's supply of which gemstone comes from Australia?
Correct answer: Opal
SJK
Coober Pedy is the place in South Australia to find them.
Avenue
Lightning Ridge produces black opals, which in my opinion are the best opals :-)
nowtable89
I didn't know the answer and just guessed
nooni
Ih'lani, kidney stones?
Ih'lani
opal is the one stone I didn't have knowledge of how it was originated.