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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
petrified wood
ck_admin
March 24, 2021
This is a fossilized wood dating back 200 million years, all parts of a trunk or branches have been silicified, that is to say that the organic components have been gradually replaced by silica in the form of jasper, chalcedony, or more rarely opal, there
barytocalcite
ck_admin
March 24, 2021
Discovered in 1824 in England, it was named after its composition, it contains barium as much as barite and it is a carbonate (calcium, as calcite, but with the addition of barium).
