Not an urban legend but a rural one...
If your shell is Strombus gigas (the Pink Conch or Queen Conch), the
crystaline style is thought to have aphrodesiac qualities. See the Conch-L
archives for that discussion.
Visit my website at http://www.mindspring.com/~shellelegant
Peggy Williams
Shell Elegant
PO Box 575 * Tallevast FL 34270
(941) 355-2291 * [log in to unmask]