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Gemdat.org is run by Jolyon and Katya Ralph. To contact Jolyon by email, write to

We would appreciate your contact, gemstones, money, old issues of Gems and Gemology and other goodies:

Please send anything to:

Jolyon Ralph,
81 Woodcote Grove Road,
Coulsdon, Surrey,
CR5 2AL
ENGLAND

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Copyright © Jolyon & Katya Ralph 1993-2017. Site Map. Locality, gem & photograph data are the copyright of the individuals who submitted them. For more information please contact the . Gemdat.org is an online information resource dedicated to providing free gemmological information to all.