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Spiral structure in a Colombian emerald
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01.07.2019
Mogok : The Valley of Precious Stones
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01.10.2018
GemAlliance welcomes its 5th member: the LFG
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01.06.2018
GemAlliance welcomes its 4th member: the JGGL
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17.11.2017
AIGS & GGTL announce the launch of GemAlliance
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Main services
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Exclusive services
Cleaning and sorting of chemically-unset melee diamonds
Cleaning & oiling of emeralds
Coral species identification
Cullinan report
Consulting
Publications
T. Hainschwang
F. Notari
C. Caplan
F. Blumentritt
Other
Diploma (D.U.G.)
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