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
kornerupine
ck_admin
March 24, 2021
Mineral honoring the young Danish geologist Andreas N. Kornerup (1857-1881) who discovered it in Greenland. Sometimes it can present a speckle of the type “cat eye”. Often brown and dark, beautiful yellow-green varieties are from Sri Lanka and it has now been discovered in emerald
jet
ck_admin
March 24, 2021
This is an organic material, a black variety of lignite containing 70% of carbon, resulting from the coalification of wood under anaerobic conditions (without oxygen) and under strong pressure, it is a fossil gem. Its name comes from old French “jayet” or “jaiet” or the
jade
ck_admin
March 24, 2021
In the nineteenth century, it was shown that the so-called “jade” actually consisted of two distinct minerals: The “Jadeite”, of the pyroxene family, is the hardest and most rare, it has a crystalline sound, its color varies from white to dark green, even lavender. The
hydroxyapatite
ck_admin
March 24, 2021
As for the apatite, its name derives from the Greek to indicate that the apatite has often been confused with other gems, plus the mention of “hydroxy”added . This is a major constituent of bones and teeth.There is a very dark green variety rich in
hodgkinsonite
ck_admin
March 24, 2021
Discovered in 1913, its name honors H.H.Hodgkinson of the Franklin Mine in New Jersey, United States, where it was discovered.
