gaylussite
ck_admin
March 24, 2021
Identified in 1826 in Venezuela, its name honors the French chemist Gay-Lussac (1778-1850).
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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 …
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gadolinite
ck_admin
March 24, 2021
Appointed in 1800 in honor of the Finnish mineralogist Johan Gadolin (1760-1852) who isolated the Yttrium element in 1797. This rare earth is used to imitate the diamond, synthetic zirconia oxide, to stabilize it in a cubic form at atmosphere temperature. Gadolinium is one of
friedelite
ck_admin
March 24, 2021
Its name honors the French chemist and mineralogist Charles Friedel (1832-1899).
ekanite
ck_admin
March 24, 2021
Identified Only in 1955 by Ekanayake, this is one of the few carved stones that is naturally radioactive. This feature makes it sought as a rare stone by collectors, transparent stones are even rarer. In addition, the radioactivity alters its crystalline structure over time.
meerschaum
ck_admin
March 24, 2021
This is a silicate in the form of tiny crystals assembled in concretions in highly porous aggregates. This porosity allows it to float, it hardens as it dries. Its name, sepiolite, it has been awarded by the German mineralogist E. F. Glocker, that determined the
