translucent

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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ouvarovite round cut

uvarovite

It is a green garnet. Named in honor of a Russian count and statesman, Sergey Uvarov Semeonovich (1786-1855). It is rarely found in gem quality. Its green color is due to chromium.

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opal from Australia

opal

Its name comes from the Sanskrit “upala” which means precious stone, or the Greek “opallios” and Latin “opalos”. It is distinguished by iridescent reflections depending on the angle of vision, recalling the rainbow, who gave the term “opalescent”. Hydrated silica gel, it does not crystallize.

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cut onyx

onyx

The onyx are varieties of chalcedony. Mineralogists describe them as varieties of agate. The name comes from a Greek word meaning “nail” because of the color of the loose nail. The gemologists and gem cutters talk about completely black gems or in banded layers of

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olgoclase from Brasil oval cut

oligoclase

From the family of plagioclase, its name comes from the Greek “oligo”, a little bit, and “klassos” break, because it is a feldspar whose cleavage is more difficult than for others. It is part of the albite-anorthite series. It was identified by Breithaupt in 1826.

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black obsidian from Ascension Island

obsidian

Its name comes, according to Pliny, from Obsidius who brought it from Ethiopia, which would have led the Romans to call it “obsidius lapis”. From the seventeenth century we find the names of hyalopsite, mountain mahogany, Iceland black agate, mirror of the Incas, gallinaceous stone

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neptunite emerald cut

neptunite

Discovered by the mineralogist Flink in 1893, it was named Neptune, the God of the Sea for the Romans, as it was discovered on the same site, in association with aegirine, the scandinavian name of the God of the sea

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