All,
I must apoligize I completely zoned out on this. In the iddle of a major renovation of my house. Fred Ward's photos were disapointing. I posted one on a blog post:
http://gemwiseblogspotcom.blogspot.c...ect-pearl.html. Fred was unable to capture the rainbow orient on Ziede's pearls. I used a couple of images we took of Black southsea and Chinese freshwater. The Tahitian shell show distinct orient.