chondrodite
ck_admin
March 24, 2021
Discovered in 1817, its name comes from the Greek “chondros” which means grain in connection with its well-formed crystals, isolated in the form of grains.
brown
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
childrenite
ck_admin
March 24, 2021
Discovered in 1823, its name honors the English mineralogist John George Children (1777-1852). It is very close to the eosphorite and in its chemical composition iron is the dominant on manganese, unlike eosphorite where manganese is dominating.
chambersite
ck_admin
March 24, 2021
New mineral discovered in 1957 in Texas, in Chambers County (Barber’s Hill salt dome), hence its name. The crystals were found in the brine returns from a gas drilling because it is a borate insoluble in water. Thereafter deposits were discovered in Louisiana, Canada, and
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
