Where can I get a large glass bead identified?

I have some large round parallel-laid millefiore caned glass beads. They’re approximately 1 1/2″ across, with a glossy-to satiny sheen and various color combinations. I’ve never seen these before in all my years of collecting, and wondered if there are others??? Is there a site that has pictures for identification? They are supposed to be African trade beads, about 100 years old.