http://beadcollector.net/cgi-bin/anyboard.cgi?fvp=/openforum/&cmd=iYz&aK=35168&iZz=35168&gV=0&kQz=&aO=1&iWz=0

Many recent imitations of seals were made via wheel-cutting, that creates somewhat crude lines like gashes. That's what I see with your bead.

Actual ancient seals were constructed very differently. There are, to be sure, more-authentic-looking imitations of old seals. And it can be difficult to distinguish them. But the wheel-cut imitations stand apart (because they are crude).

Also, I am surprised by the micro-cracks in the material. They make the surface seem almost organic.

JDA.