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Spiral structure in a Colombian emerald
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Research
01.07.2023
Cinnabar Inclusions in Ethiopian Opal
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Research
01.07.2023
An Ethiopian cup in rhinoceros horn (1/2)
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Research
30.06.2023
An Ethiopian cup in rhinoceros horn (2/2)
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Research
25.06.2023
An exceptional 9.89 carats photochromic zircon
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Research
12.05.2021
The unusual case of a jewel with a large number of flux-grown synthetic rubies sold as natural rubies
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Micrographs, Research
19.10.2020
The heat treatment of corundum at Moderate temperature
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Research
02.10.2020
Review and update of the classification of precious corals.
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Research
04.09.2020
New Large Black Synthetic Moissanite as a Black Diamond Imitation
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Research
15.10.2019
Efficiently Testing Melee-Sized Coloured Stones
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Research
28.05.2019
Cobaltocalcite or cobaltoan calcite: A Swiss answer
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Micrographs, Research
28.08.2018
“Boehmite Needles” in Corundum Are Rose Channels
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Research
16.12.2016
Origin and growth of alpine fissure minerals in the western Swiss Alps: record of fluid flow during exhumation
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