This little slice of Koroit boulder opal has been cabbed, polished, and housed permanently in metal.

With a silver border, and 14 kt gold wire that wraps around the back to form the prongs, this cab is set in place.  There is some wavy brown ironstone with a few seams of gemmy opal with blue/green fire.  The silver bail is pave set with blue sapphires, and the gold oval hoop hangs your chain from there.

Comes with a 24 inch silver plated wheat chain as seen in the second photo.