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Spiral structure in a Colombian emerald
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15.12.2008
Natural pearls of the Veneridae family
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Main services
Colourless diamond services
Fancy diamond services
Gem services
Identification of biogenic materials
Jewellery
Exclusive services
Cleaning and sorting of chemically-unset melee diamonds
Cleaning & oiling of emeralds
Cullinan report
Watch industry gemstones
Consulting
Publications
T. Hainschwang
F. Notari
C. Caplan
F. Blumentritt
Other
Diplomas
Products
News
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