halides

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 …

villiaumite

ck_admin March 24, 2021

Its name honors Maxime Villiaume, French soldier and explorer who made collections of minerals from Madagascar and Guinea. The villiaumite was found in its samples coming from Guinea (Rouma Island). For gemologists: watch this stone has an significant polarization abnormality, while being isotropic.

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sellaite

ck_admin March 24, 2021

Discovered in France in 1868, it honors the name of the Italian mineralogist Quintino Sella (1827-1884). This is a fluoride such as fluorite, but of magnesium.

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fluorite

ck_admin March 24, 2021

It is known since antiquity, its name comes from the Latin verb “fluere” which means “ to flow “ because it was already used as a flux in metallurgy. The composition evokes the name of this mineral: it contains fluorine, an element which was so

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creedite

ck_admin March 24, 2021

Described in 1916 by Larsen and Wells, it owes its name to the town of Colorado (USA) where it has been identified: Creede quadrangle. It is a calcium sulfate and hydrated aluminum fluoride.

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