G’day Noel
Can I suggest a book by Jean Taburiaux titled PEARLS their origin,
treatment and identification. Published by N.A.G. Press ISBN
0-7198-0151-6.
Pearls: Their Origin, Treatment and Identification
By Jean Taburiaux
It’s a great read and for a reference book on gems with
comprehensive section on pearls you can’t go past GEMS by R. Webster
published by Butterworth and Co ISBN 0408705786.
Gems: Their Sources, Descriptions, and Identifications
By R. Webster , Robert Webster
Cheers
Wiil Francis
Melbourne
www.homepage.mac.com/willfrancis