indistinct
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 …
actualités
andradite
ck_admin
March 24, 2021
Andradite: this variety of garnet has been described and identified by Dana, its name is a tribute to a Brazilian mineralogist Jose Bonifacio de Andrada e Silva (1763-1838). Mélanite : black titanoan variety, its name comes from the Greek “black”. Topazolite : yellow variety of
almandite
ck_admin
March 24, 2021
It is the most well-known and widely distributed garne, named after its locality Alabandicus or Alabanda, a town in Asia Minor, currently in Turkey.Since Antiquity Pliny the Elder used to qualified it as gem. It was once known as carbuncle, an archaic name given to
allanite
ck_admin
March 24, 2021
Named by Thomas Thomson in 1810 after the scottish mineralogist Thomas Allan. This is a mieral close to epidote and there are 3 types of allanite based on their concentration in cerium, lanthanum, yttrium (rare earth element). The lanthanum variety is radioactive.
