![green tremolite of Tanzania oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/tremolite-ovale-tanzanie42.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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![green tremolite of Tanzania oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/tremolite-ovale-tanzanie42.png)
![rubellite variety of tourmaline from Brazil](https://www.patrickvoillot.com/wp-content/uploads/2021/03/tourmaline-rose-taillee-bresil43.png)
tourmaline
ck_admin
March 24, 2021
Its name comes from Sri Lanka, Ceylon, where it was called “tourmali” or “torra molli”, stone attracting ashes, it is considered as a colored zircon. It was not until 1703 that the Dutch brought it to Europe. It was identified by Buffon in 1759. It
![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)
![manganotantalite rectangular cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/manganotantalite-rectangulaire6.png)