Spencer is about two hours north of where I am. I've been there, and the streets are NOT paved with gold. In fact, they are barely paved at all. BUT they do have some absolutely gorgeous opals, both raw and polished. You can buy them mounted or unmounted, too. When I was up there two years back you could even go out to the opal mine (a pit, really) and poke around and see what you could find.

But Man! there are some nice opals there! (And the prices show that the locals know the value of their work, too. A pair of earrings for my wife set me back US $200.)