silicates

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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crocidolite hawk’s eye

compact quartz

This group includes compact quartz containing inclusions of another mineral which determines the appearance and color. Tiger’s Eye and Hawk Eye: The name comes from the fact that the polished cabochons show a light stripe evoking the split pupil of a tiger, the second name

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pyroximangite fancy cut

pyroxmangite

It takes its name from its resemblance to the pyroxene and its manganese content. Rhodonite has the same composition as the pyroxmangite formed in conditions of higher pressure and temperature.

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pyrope garnet from Africa oval cut

pyrope

Its name comes from the Greek “pyros” for fire. Of variable color, the red one, more or less tinged with brown, being the most sought after. It was called “carbuncle” which means red like fire, and the expression “shining like carbuncles” was widely used by

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pyrophyllite crystals of Georgia in the U.S.

pyrophyllite

Uncommon mineral, present in hydrothermal veins. Its name comes from the Greek “pyros” for fire and “phyllos” as sheet, because with the heat this mineral is exfoliating, and swells in superposed sheets.

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pumpellyite from Lake Superior in Michigan in the U.S.

pumpellyite

Rare mineral found in the Carriere de la fleche, at Bertrix in the Ardennes, Belgium. We must speak of “pumpellyites” because there are some in which magnesium dominates, in others it is aluminum and yet in others it is iron, as shown here for this

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prehnite crystals from India

prehnite

Named in honor of the Dutch collector and Colonel H. Van Prehn who discovered it. Most prehnites used as gems come from Australia.

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