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 …
It is known since antiquity, its name comes from the Greek “khalx” for lime. Identified and analyzed from the seventeenth century and then by Rene-Just Haüy to its easy cleavage. Called Iceland spar, the crystals exhibit the phenomenon of double images: a feature seen through
It is its discovery near the town of Conseilheira Pena, in Minas Gerais (Brazil) in 1945 by Pough, which gave its name (Brazil is written Brasil in Brazilian).
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
