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 …


heart cut ulexie


Named in honor of the German chemist George Ulex (1811-1883). We notice a rare property: if the ends of a thick plate are well polished perpendicular to the longitudinal direction of its crystal fibers, they behave like optical fibers. A Printed text placed below appears

crystallized talc from Luzenac in Arriege in France


Its name comes from Arabic or Persian “Talq” which means pure, probably because of its powder. It has been known since antiquity. The light green soapstone (steatite) has been confused with jade, but it has not its hardness. This is number 1 in the standard

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

faceted hematite


It is also called blood or blood stone and his name probably comes from the fact that it turns blood red the cooling water when it is cut (from the Greek “haimatos” for blood). Note however a false-English friend: “bloodstone”, this English name is referred

goethite and lepidocrocite inclusions in quartz from Brazil cushion cut


It is known and used since prehistory, prehistoric people used it as a pigment for paint in the caves, such as at Lascaux. It was identified in 1806 by the mineralogist Johann Georg Lenz (1748-1832) and its name honors the German writer Goethe. This is

oval cut kyanite from Nepal


Its name recalls its dominant color : blue in Greek (cyan). Sometimes colorless, but generally blue to bluish green, this gemstone has a hardness ranging, with its texture in plans, from 4.5 (direction of elongation) at 6 to 7 (perpendicular to the elongation). It also

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