![siderite round cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/siderite-taille-ronde70.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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![siderite round cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/siderite-taille-ronde70.png)
![shungite from Russia cut in cabochon](https://www.patrickvoillot.com/wp-content/uploads/2021/03/shungite-cabochon-russie69.png)
![African serpentine oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/serpentine-taille-ovale-afrique-15.png)
serpentine
Serpentine, or rather the serpentines, is a group of over 20 minerals quite difficult to differentiate the one from the other, the best known of whom are : antigorite, chrysotile and lizardite. These Phyllosilicates are weathering products of magnesium silicates. The Ophite, sometimes called “ophite
![senarmontite fancy cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/senarmontite-taille-fantaisie12.png)
senarmontite
Discovered in 1851 at Djebel Haminate, in the area of Constantine in Algeria, its name honors the mineralogist Henri Hureau de Senarmont (1808-1862).
![scorzalite round cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/scorzalite-taille-rone10.png)
scorzalite
Discovered in 1957 in Brazil (Corrego Firo pegmatite, Linopolis, Doce valley, Minas Gerais). Its name honors the Brazilian geologist who discovered it: Evaristo Penna Scorza (1899-1969).
![scorodite cut in cabochon](https://www.patrickvoillot.com/wp-content/uploads/2021/03/scorodite-cabochon-9.png)