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 …
Discovered in 1824, it honors the name of the American geologist Benjamin Silliman (1779-1864). It is also known for its blue or violet variety called fibrolite. It has been known since prehistoric times and it was used to manufacture cutting tools. There is also a
Discovered in 1851 at Djebel Haminate, in the area of Constantine in Algeria, its name honors the mineralogist Henri Hureau de Senarmont (1808-1862).
Discovered in 1980, its name honors the German gemologist Karl Schlossmacher.
It takes its name from its blue color, recalling the sapphire. It was discovered in Greenland in 1819 .
