Solids, Doublets, Triplets

When buying diamonds, sapphires or rubies, you have either a real one or a synthetic. But with opal you can buy an expensivesolid stone, or you can buy a triplet or a doublet. Doublets and triplets are far more affordable than solid opals--and they are still real opal.

Solid Black Opal	A solid piece of opal with a natural black back. This makes the stone darker and opaque [non see-through] on top. Black opals come in all color variations
Solid crystal opal	A sold piece of opal without a natural black back. The stone has a lighter, more delicate color on top. It is usually translucent [letting light through] or in the case of jelly opal, sometimes nearly transparent. Crystal opals come in all color variations
Solid Boulder Opal	A solid piece of boulder opal with a natural brown ironstone back, giving it a black opal appearance from the top. It is usually opaque but can be translucent. Boulder opals come in all color variations. .
Doublet Opal	A solid piece of opal cemented to a natural black potch backing, giving the appearance of black opal on top and is opaque. Because of this dark appearance it falls into the category of dark or black opal. The stone is made of TWO pieces. Hence the name DOUBLET. Doublets come in all color variations.
Triplet Opal	A solid thin piece of opal cemented to a black background with a crystal cap cemented to the top. The stone is made of three pieces. Hence the name TRIPLET. Triplets come in all color variations. They are also categorized as dark or black opals and are opaque [non see-through]