Opal Stone – Assembled, Cabochon, Brown

Opal doublets and triplets make use of opal too thin to use as a solid gemstone. A thin layer of precious opal is glued to a black base, usually common opal. "EB217-G Enchanting Jundah Boulder Opal Doublet Silver & Gold Earrings" by Opals-On-Black.com is licensed under CC By 2.0

Article: A Cabochon Bezel Setting For Unusual Opal Doublets

Credit: Opals-On-Black.com