Australian Oval Green-Blue-Red Opal Doublet

About Opal Doublet

An opal doublet consists of a thin slice of opal, usually precious opal showing play-of-colour, attached to a darker backing. The backing may be common opal, ironstone, basalt, glass or another suitable material, depending on the piece. It can make the colours appear stronger and the stone look more substantial. The opal layer may be translucent, transparent in places or opaque; the finished doublet is often viewed from the…