If
you're
interested in the
references –
over 2500 of them – you
obviously owe it to
yourself – professionally
speaking – to purchase
a copy of the book.
Users may download this information for their own private, non-commercial use.
Other reproduction (text or graphics) without the express written consent of Richard W. Hughes is strictly prohibited.
Ruby-Sapphire.com is dedicated to the free exchange of ideas on gems, gemology, the gem trade and other matters concerning the trade in precious stones and jewelry. Unless otherwise stated, opinions expressed herein are solely those of Richard Hughes/RWH Publishing.