All -- I picked up these really interesting Shell beads from an estate auction a couple of weeks ago. They were listed as "Pre-Columbian" and possibly "Huari" and dated to 700 - 1000 C.E. Honestly, these beads are a little outside my area of expertise, but they are awfully neat. Any ideas about whether that's the correct attribution?

Thanks!
Abe @ Beadstore.com