![oval cut scheelite from China](https://www.patrickvoillot.com/wp-content/uploads/2021/03/scheelite-taille-ovale-chine70.png)
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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 scheelite from China](https://www.patrickvoillot.com/wp-content/uploads/2021/03/scheelite-taille-ovale-chine70.png)
![scapolite from Tanzania drop cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/scapolite-tanzanie-goutte71.png)
scapolite
It owes its name to its prismatic facies (from the Greek “skapos” rod and “lithos”, stone) and designates an isomorphic series going from sodic marialite to calcic meionite. The members of this series are the Wernerite, the Dipyre, the Meionite, the Marialite. The Wernerite, which
![rutile as inclusions in quartz](https://www.patrickvoillot.com/wp-content/uploads/2021/03/rutile-inclusion-quartz-bresil74.png)
![yellow rhodizite from Madagascar](https://www.patrickvoillot.com/wp-content/uploads/2021/03/rhodizite-madagascar79.png)
rhodizite
Discovered in 1834, its name comes from the Greek “pink” because it has the property of coloring the torch flame in pink. It presents the phenomenon of piezoelectricity and pyro-electricity. The rhodizite is one of the poles a series dominated by potassium, the other pole
![emerald cut pyrargyrite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/pyrargyrite-taille-emeraude86.png)
pyrargyrite
Described in 1831 by Glocker, its name comes from the Greek “pyros” meaning fire and “Argyros” for money. It is a silver salt of a fire red color.
![emerald cut proustite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/proustite-taille-emeraude88.png)