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 …
This is a silicate in the form of tiny crystals assembled in concretions in highly porous aggregates. This porosity allows it to float, it hardens as it dries. Its name, sepiolite, it has been awarded by the German mineralogist E. F. Glocker, that determined the
Chalcedony: This is a term including microcristallines and cryptocrystalline varieties of quartz, which come from the Greek name of the famous city of Carthage “Karkêdon”. Extracted in Egypt and Syria, it has been used since ancient times for intaglios and cameos, an active trade with
Its name comes from the Greek “alabastros” (earlier albatos) which designated a vase without handles, alabaster being used to make perfume vases without handles. Alabaster is an evaporite mineral. It is a massive aggregate of fine-grained variety of gypsum, its softness make it easy to
