The Spiro Mounds site has produced many

unique artifacts. The engraved conch shell

cup in this picture is a nice example. The most

important and extraordinary finds from Craig

Mound are the shell engravings. The multitude

of images the engravings portray are the best

written visual history left behind on a single
site by any Late Stone Age culture in North

America. The Phillips & Brown project of

recording shell engravings from Craig Mound
lists well over 1,400 complete examples and

fragments of cups ("conch shell dippers"),

gorgets and other small miscellaneous pieces.

The Peabody Museum Press published the

study in "Pre-Columbian Shell Engravings".