There are many types of opal with the most common being white opal, black opal, fire opal, boulder opal, and a favorite of ours Ethiopian opal. Opals are a softer stone at 5.5-6.5 on the Mohs scale. If you don't see what you're looking for, contact us. We offer custom jewelry without design fees. We have thousands of gemstones and manufacturer our settings for a truly one-of-a-kind piece.