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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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oval cut dolomite from Brazil

dolomite

ck_admin March 24, 2021

Identified by de Saussure in 1792, its name honors the French mineralogist Dolomieu. Very common mineral, especially as gangue in the ore deposits. Not to be confused with dolostone which is a rock composed of dolomite.

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dioptase from Zaire cut in cabochon

dioptase

ck_admin March 24, 2021

It has long been confused with emerald with whom shares the same color, but it was identified in 1801 as a specific species by René Just Haüy. Its name comes from the Greek, recalls that its cleavage planes are visible through the crystal, which was

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yellow green diopside from Sri Lanka cushion cut

diopside

ck_admin March 24, 2021

Its name comes from the Greek, “two” and “appearance” because of the double surface appearance of the prism when it is crystallized. Diopside is also “starred”, “shimmering” and the chromite variety, gemstone essentially coming from Russia, is emerald green. A deposit in Piedmont( Italy )

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diaspore from Turkey

diaspore

ck_admin March 24, 2021

Discovered in 1801 in the Urals in Russia, its name comes from the Greek word “diaspora”, meaning “disperse” because when heated with a blowtorch it explodes and disperses into small particles. It is a component of earthy bauxite, but is found in gem quality in

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yellow datolite from Russia oval cut

datolite

ck_admin March 24, 2021

Its name comes from Greek by illustrating its ability to “split” into pieces when massive datolite aggregates are broken. A rock rarely found in a gem form, it is often associated with zeolites in basalt cavities.

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oval cut danburite from Mexico

danburite

ck_admin March 24, 2021

It owes its name to Danbury (Connecticut, United States), where she was discovered in the nineteenth century. In a similar hardness as quartz, it does not exist in brightly colored varieties.

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