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Spiral structure in a Colombian emerald
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Micrographs
01.05.2025
Disordered carbon in cryptocrystalline fuchsite from Ya'an, Sichuan, China
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Insight
01.05.2025
Discover the new D-Tect V2 at GemGenève – Booth L11
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Micrographs
23.04.2025
Cultured pearls seen under X-rays
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Micrographs
16.04.2025
Calcite crystals in NTE ruby from Mogok, Myanmar.
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Insight
31.03.2025
The GEMMES journal celebrates its fifth edition
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Micrographs
12.03.2025
A 24.21-carat yellow sapphire with characteristics similar to those found in Madagascar-origin sapphires
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Insight
10.03.2025
Jardin d’Hiver 2025 at GGTL Laboratories Switzerland
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Micrographs
31.01.2025
Iridescence in a rainbow andradite from Nara in Japan
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Publication
24.01.2025
Lab Alert! Melee-sized HPHT Treated Yellow Diamonds appear in the Market
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Micrographs
19.01.2025
Flame pattern in a non-nacreous natural pearl from Aliger gigas
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Insight
06.01.2025
Féodor Blumentritt Speaks on Gem Treatments at the XXI Rendez-Vous Gemmologiques de Paris
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Insight
06.12.2024
Gem books you absolutely need to read!
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Navigation SM
About us
Services
Main services
Diamond services
Gem services
Pearl services
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.)
Products
News
Contact
en
fr