But mining black opal isn't easy. After investing tens of thousands of dollars, a miner might not find a single gem. So, what makes black opal so hard to find? And why is it so expensive?

Over 90% of black opals come from Australia, but they aren't easy to find. Miners start by drilling a vertical shaft in an area they think contains opal. Then they must clear out an underground ...

How does a jeweler find the best way to showcase a selection ... uses rare Australian black and crystal opals and Mexican ...

players must be finding it pretty hard to cope up with all the norms in the game, like finding precious gems like Opals. That is why this guide will help you finding that.