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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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![pink topaz oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/topaze-rose-bresil-taille-ovale44.png)
![green chrome titanite cushion cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/titanite-sphene-chromifere45.png)
titanite
ck_admin
March 24, 2021
Identified in 1795, its name expresses its high content of titanium. It has long been known as sphene, which came from the Greek “sphenos” for corner, which described very well the shape of its wedge-shaped crystals. Brookite, of the same composition, crystallizes in another crystal
![thorite round cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/thorite-ronde46.png)
![thaumasite emerald cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/thaumasite-taille-emeraude47.png)
thaumasite
ck_admin
March 24, 2021
Discovered in Sweden in 1878, its name comes from the Greek “thaumasion” which means surprising, in relation to its amazing chemical composition.
![tanzanite from Tanzania rectangular cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/tanzanite-tanzanie-triangle48.png)
![manganotantalite rectangular cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/manganotantalite-rectangulaire6.png)