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
Serpentine, or rather the serpentines, is a group of over 20 minerals quite difficult to differentiate the one from the other, the best known of whom are : antigorite, chrysotile and lizardite. These Phyllosilicates are weathering products of magnesium silicates. The Ophite, sometimes called “ophite
