Hi to all,
I have read all 120 pages of a pre-publication copy of Ken Scarratt's monograph on Nautilus pearls. He heads the GIA Laboratory in Bangkok, and has studied every known Nautilus pearl in his lab, a total of 5 in the world. Once his monograph is published, I'll post a link to enable everyone to purchase it, which is filled with incredible photographs, scientific data, testing data, etc.
In the monograph, he also studied, authenticated, and reported on an even rarer pearl, the only one of its kind, from Argonauta, or "Paper Nautilus," which I found a few months ago.
Best regards,
Tom Stern,MD