How to spot treated opal
This week Justin will take you through some obvious and not so obvious differences between natural Australian black opal and treated black opal. Key factors … Read more
I smoked an Ethiopian opal
Ethiopian opal is beautiful but very different to Australian opal. Today, I show you how Ethiopian opal can be treated to look like glass or … Read more
Synthetic opal or not? These opals need testing!
While I was in Tucson this year I cam across some opal that had me stumped for a while. At first I thought it was … Read more
