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Spiral structure in a Colombian emerald
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Micrographs
25.06.2025
Negative quartz crystals in colourless quartz
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Micrographs
11.06.2025
Octahedral sylvite crystals in a Colombian emerald
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Micrographs
28.05.2025
Trigons on the surface of a green diamond crystal
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14.05.2025
Mica crystals inside an emerald, Kafubu, Zambia.
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01.05.2025
Disordered carbon in cryptocrystalline fuchsite from Ya'an, Sichuan, China
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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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Micrographs
12.03.2025
A 24.21-carat yellow sapphire with characteristics similar to those found in Madagascar-origin sapphires
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31.01.2025
Iridescence in a rainbow andradite from Nara in Japan
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Micrographs
19.01.2025
Flame pattern in a non-nacreous natural pearl from Aliger gigas
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Micrographs
21.09.2024
Natural glass inclusions in the form of atolls in an unheated ruby
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Micrographs
21.09.2024
Formation of synthetic spinel in a heated sapphire
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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