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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
cancrinite
ck_admin
March 24, 2021
It was identified in 1839 by a German mineralogist and named in honor of the Russian Finance Minister George Kankrin (1774-1845). This stone is particular : it is a silicate but effervesces with acid because it contains carbonates.
calcite
ck_admin
March 24, 2021
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
chalcedony
ck_admin
March 24, 2021
Chalcedony: This is a term including microcristallines and cryptocrystalline varieties of quartz, which come from the Greek name of the famous city of Carthage “Karkêdon”. Extracted in Egypt and Syria, it has been used since ancient times for intaglios and cameos, an active trade with
brazilianite
ck_admin
March 24, 2021
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).
