Even Mars has opal but precious colorful opal is from OZ.
Sure Ethiopia has nice opal but owners complain it gradually turns urine yellow. Koroit Opal has a fractal quality I like.
At 10 times the price of gold and opal prices that makes diamonds look as cheap as zirconia is possibly an indication, there are too many billionaires.

I got a huge slab of aqua opal from Peru that looked like a shallow sea and an underwater seafloor 25 years ago and drove me to collect opals that would make it look like a carefree aquarium. Everything came by mail. The last added piece is also from Peru and is a large carving of two blue dolphins amid seaweed. The flashing color stuff I put on the back side as if to hide it.

There are a million paintings but only one of these so I am asking an Art price and not a gemologist price. For some time, Sotheby's has been inching into the primary market by selling works directly from artists' studios. Now, the auction house is firming up those moves, launching a new primary market sales channel for artists and their galleries. https://www.theartnewspaper.com/2022/09/08/sothebys-launches-primary-market-channel-selling-works-directly-from-artists-studios