Information about Gilson Created Opal
The Gilson Created Opal, invented by Pierre Gilson of France in 1974, is considered by gemologists to be the worlds finest laboratory grown opal, requiring a year or more to grow.

Blending classic gem beauty with the kind of impressive improvements only the latest scientific technology can provide, the Gilson Created Opal miraculously mirrors the structure, appearance and true color play of naturally occurring opal. The Gilson Created Opal shows strength under pressure and is heat resistant up to 2600 degrees.