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Last updates: | |
August 2024 | Program of classes 2024 - 2025 update |
March 2024 | Mineralshows in Switzerland 2024 update |
March 2023 | Ruby-Zoisite Jewelry class in Tanzania 8 days New |
March 2023 | Cutting and carving Jade, with a visit to a jade deposit in Switzerland New |
March 2022 | Second hand tools |
Decembre 2022 | Gemological and jewelers tools update |
June 2022 | Gemology, faceting and concave faceting new intensive 5 day classes |
June 2021 | Before and after recutting for best brilliance. |