![trillion cut sinhalite from Sri lanka](https://www.patrickvoillot.com/wp-content/uploads/2021/03/sinhalite-trillion-sri-lanka65.png)
orthorhombic
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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![trillion cut sinhalite from Sri lanka](https://www.patrickvoillot.com/wp-content/uploads/2021/03/sinhalite-trillion-sri-lanka65.png)
![yellow - green sillimanite from Tanzania](https://www.patrickvoillot.com/wp-content/uploads/2021/03/sillimanite-tanzanie67.png)
sillimanite
ck_admin
March 24, 2021
Discovered in 1824, it honors the name of the American geologist Benjamin Silliman (1779-1864). It is also known for its blue or violet variety called fibrolite. It has been known since prehistoric times and it was used to manufacture cutting tools. There is also a
![emerald cut shortite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/shortite-taille-emeraude17.png)
![shomiokite fancy cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/shomiokite-taille-fantaisie16.png)
shomiokite
ck_admin
March 24, 2021
Discovered in the Kola Peninsula, near the river Shomiok that gave it its name.
![scorodite cut in cabochon](https://www.patrickvoillot.com/wp-content/uploads/2021/03/scorodite-cabochon-9.png)
![purpurite from United States](https://www.patrickvoillot.com/wp-content/uploads/2021/03/purpurite-brute-etats-unis87.png)