Marche
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BERGEON
Bergeon Since 1791
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DIAMOND PACIFIC
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Euromex
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FACETRON
Facetron Faceting machine
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Gem Security
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GEM-A
Gem-A Instruments
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Gemchrom
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Gemmarum Lapidator srl
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GIA
Gemological Instruments of America
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Hagerty
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Kassoy
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Kruss
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Leica
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METTLER TOLEDO
Bilance Mettler Toledo
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Motic
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Ogi Systems Group
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OHAUS
Bilance di precisione OHAUS
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OPTIKA
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Presidium
Diamond Tester Technology
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PROXXON
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RAYTECH
Raytech Tumblers
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SCHNEIDER GEMMOLOGIE
Schneider Gemological Instruments
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SMARTPRO
Gemstones Tester
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SWISOTECH
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TANITA
Tanita Bilance Portatili di Precisione