Marilyn Green came across this on a local beach a few weeks ago.
Abalone shells wash up on beaches and are fun to find. Someone did a little collecting and left them for others to take. It's the interior of the abalone shell that has iridescence.
This photo was taken by Jack Likins of a eleven inch abalone he dove for a few years ago. To get a ten inch ab is a dream of many divers. Jack's accomplishment of an eleven incher is amazing.
Thanks to Marilyn and Jack for allowing me to share their photos with you here.