Natural etching structure on a crystal face of diamond (trigons), polarised light
Natural etching structure on a crystal face of diamond (trigons), polarised light
Two-phase inclusions in sapphire, Sri Lanka
Two-phase inclusions in sapphire, Sri Lanka
«Red fox agate» from Patagonia, Argentina
«Red fox agate» from Patagonia, Argentina
Inclusion of apatite in ruby from Tanzania
Inclusion of apatite in ruby from Tanzania
Structure in a healing fissure in topaz from Brazil
Structure in a healing fissure in topaz from Brazil
Partially etched diamond crystal
Partially etched diamond crystal
Fire opal, Mexico
Fire opal, Mexico
Fluid inclusions in quartz with bituminous daughter minerals, China
Fluid inclusions in quartz with bituminous daughter minerals, China
 
 

Actuel

Conférence nationale: 7 - 9 juin 2020, Alpenrose Wildhaus, St Gallen.

 
 
 
 
 
 

COURS RÉGIONAUX:

Suisse Romande: 29 / 30 septembre 2019

Berne: 21 / 22 octobre 2019

Bâle / Soleure / Argovie et Suisse centrale: 4 novembre 2019

Zurich: novembre 2019

Suisse Orientale / Liechtenstein: 16 / 17 septembre 2019

Tessin: 21 / 22 septembre 2019