![thulite of Norway cut in cabochon](https://www.patrickvoillot.com/wp-content/uploads/2021/03/thulite-norvege-cabochon20.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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![thulite of Norway cut in cabochon](https://www.patrickvoillot.com/wp-content/uploads/2021/03/thulite-norvege-cabochon20.png)
![yugawaralite emerald cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/yugawaralite-taille-emeraude22.png)
![whewellite fancy cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/whewellite-taille-fantaisie26.png)
whewellite
ck_admin
March 24, 2021
It honors the name of the English mineralogist William Whewell (1794-1866). It is a component of kidney stones. The fine twinned crystals result from the reaction of the urine of horses working in the mines with the host rock.
![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.
![senarmontite fancy cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/senarmontite-taille-fantaisie12.png)
senarmontite
ck_admin
March 24, 2021
Discovered in 1851 at Djebel Haminate, in the area of Constantine in Algeria, its name honors the mineralogist Henri Hureau de Senarmont (1808-1862).
![emerald cut sellaite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/sellaite-taille-emeraude11.png)