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 …
Its name comes from the Greek “kassiterôs”, tin, or the name of the islands “Cassiterides” that produced this tin ore in antiquity, very likely islands very close to present-day Spain that would have given their name to this tin mineral, cassiterite. It is the principal
So called because of the presence of beryllium, it was named by James Dana in 1888.
Discovered in 1824 by Beudant Chessy-les-Mines in France, azurite takes its name from its azure blue. It has been known since antiquity, it is a copper carbonate, which effervesces with acids. It is often associated with malachite, green, in copper deposits, as azurite turns into
