The bright, saturated colors and columns visible in the bottom right corner indicate synthetic opal. © Opal Auctions. Used with permission.…
Finding a seam of precious opal is the goal of many opal prospectors. Photo by Géry Parent. Licensed under CC By-ND 2.0.
While the miner who found this nodule hit the jackpot, it’s entirely possible that there was no other precious opal nearby. Photo by James St.…
Although it takes up little of the stone’s face, this bright yellow feather is certainly delightful. Black opal (Stayish Mine, Wollo Province,…
Ribbon opal patterns like this are rare and valuable. Striped Brazilian opal, photo by LZ6387. Licensed under CC BY-SA 4.0.
The large but irregular size and shape in this opal’s play of color resemble flagstone. Photo by Ra’ike. Licensed under CC By 3.0.
You can see the honeycomb pattern in this Ethiopian opal. © All That Glitters. Used with permission.
Each opal in this ring features a different pattern. Photo by James Petts. Licensed under CC By-SA 2.0.