very strong

Je vous emmène à travers mes vidéos découvrir mon expérience acquise depuis plus de 30 ans a silloner le globe entier à la recherche de pierres précieuses, de rencontre mémorables mais aussi de difficulté parfois …


thulite of Norway cut in cabochon


Identified by Werner in 1805 in the Austrian Alps, it was named after the Austrian Siegmund Zois, Baron von Edelstein (1747-1819). It is part of the epidote group. Its best-known variety is tanzanite which is not a mineral recognized by the International Mineralogical Commission for

tanzanite from Tanzania rectangular cut


This is the blue variety of zoisite. It would have been known since 1954, but it was in 1967 that Manuel de Souza “discovered” this gem by chance, in Arusha, Tanzania. Soon there were talks in the media about the “blue treasure of Africa”, referring

nodule of malachite from Zaire


Described by Pliny in 77 AD., its name recalls and its fault, poor hardness “malakos” which means soft in Greek, as well as its green color “malake”, which means purple green in Greek. The Egyptians, the Greeks the Romans used it since ancient times. It

green lazulite from Pakistan emerald cut


Not to be confused with lazurite, the main constituent of lapis lazuli. Lazulite is also called Klaprothite, in honor of the German mineralogist Klaproth (1743-1817) who discovered titanium and uranium, and described this stone. The name fell into disuse but it would avoid confusion between

cushion cut iolite from India


It was also known as “dichroïte” (because of its strong dichroism) or “iolite” (because of its purple color), the anglo-saxons still call it by that name. It honors the name of the French geologist Cordier, Professor at the National Museum of Natural History in Paris.

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