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World Gold Council
55 Old Broad Street
London EC2M 1RX
U. K.
Phone: +44 20 7824 4700
Fax: +44 20 7826 4799
E-Mail:
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Platinum Guild International ( UK ) Limited
16-18 Kirby Street
London
EC1N 8TS
United Kingdom
Phone: +44 (0) 20 7841 1230
Fax: +44 (0) 20 7404 7602
E-Mail:
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The Birmingham Assay Office
P.O. Box 151 Newhall Street
Birmingham B3 1SB
U.K.
Phone: +44 121 236 6951
Fax: +44 121 236 9032
E-Mail:
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Gemfields Plc
54 Jermyn Street
London SW1Y 6LX
United Kingdom
Phone: + 44 (20) 7197 8193
E-Mail:
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 - U.A.E.
Dubai Multi Commodities Centre
Level 4 Emirates Towers Offices
Post Box 48800
Dubai
United Arab Emirates
Phone: +971 4 3903 899
Fax: +971 4 3903 897
E-Mail:
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 - U.S.A.
Gem Certification & Assurance Lab (GCAL. Inc)
580 Fifth Ave, LL-05
New York, NY 10036
U.S.A.
Phone: +1 212 869-8985
Fax: +1 212 869-2315
E-Mail:
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Gemological Institute of America
The Robert Mouawad Campus
5345 Armada Drive
Carlsbad , CA 92008
U.S.A.
Phone: +1 760 603 4567
Fax +1 760 603 4550
E-Mail:
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World Diamond Council
580 Fifth Avenue
Suite 2812
New York , NY 10036
U.S.A.
Phone +1 212 575 8848
Fax +1 212 840 0496
E-Mail:
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International Coloured Gemstone Association (ICA)
19 West 21st Street, Suite 705
New York , N.Y. 10010-6805
U.S.A.
Phone: +1 212 620 0900
Fax: +1 212 352 9054
E-Mail:
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