text: where is the best place to dig for opals? i know australia is the leading place for opals but i've heard that they're mainly just common opals. i want a place that has very rare black opals or something of the sort. well australia has the best opals period, and what do you consider the common... black is available alot more in australia than in the us. there is a place in northern nv that lets you come in and dig for a fee.. lots of work but alot of fun.. if i can recall the name i will come back and edit my answer for you...