orthorhombic

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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emerald cut grandidierite

grandidierite

Discovered at Andrahomana, near Fort Dauphin in Madagascar. Its name honors the French explorer Alfred Grandidier (1836-1912).

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goethite and lepidocrocite inclusions in quartz from Brazil cushion cut

goethite

It is known and used since prehistory, prehistoric people used it as a pigment for paint in the caves, such as at Lascaux. It was identified in 1806 by the mineralogist Johann Georg Lenz (1748-1832) and its name honors the German writer Goethe. This is

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green euchroite form Slovakia

euchroite

Discovered in 1823, its Greek name means “who has a beautiful color”. It is found in veins of mica schist.

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eosphorite cut in facets

eosphorite

Its name comes from the Greek, defining the pink color at the arrival of dawn. Its chemical formula is very close to the childrenite, which is yellow-brown because iron dominates, while for éosphorite it is manganese which dominates and gives the pink color.

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orange enstatite of Africa oval cut

enstatite

Being difficult to melt, it was awarded the name of Greek word meaning “resistant” without really understanding why. The more it contains iron, more the color becomes dark and black. The more its iron content increases, more its density increases. The enstatite forms an isomorphous

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meershaum pipe from Turkey

meerschaum

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

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