All good things take time... rock hounds and specimen collectors would all agree that an opal shell is definitely worth the time it took to form. Any one who is a collector of fossils or shells could never really call their collection complete without at least one or two opalized fossil shells.
The truly stunning colors and shapes they come in make for an attractive piece to use in anyway your heart desires. An opal shell will look spectacular whether it be sitting on your mantle for all to admire, or set as a work of art to keep on your desk and will also make a great conversation starter. Who else can say 'I have one of those'?