![oval cut sulfur](https://www.patrickvoillot.com/wp-content/uploads/2021/03/soufre-ovale61.png)
indistinct
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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![oval cut sulfur](https://www.patrickvoillot.com/wp-content/uploads/2021/03/soufre-ovale61.png)
![cabochon of hackmanite from Afghanistan](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hackmanite-cabochon-afghanistan63.png)
sodalite
This is a feldspathoid, his name refers to its high sodium content. Its purplish-blue color is often streaked with white feldspar veinlets. The Hackmanite is a pink-purple variety discovered in Quebec, Canada. In its formula sulfur has been replaced by chlorine, and has an amazing
![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).
![schlossmacherite cut in cabochon](https://www.patrickvoillot.com/wp-content/uploads/2021/03/schlossmacherite-cabochon69.png)
schlossmacherite
Discovered in 1980, its name honors the German gemologist Karl Schlossmacher.
![oval cut sapphirine from Sri lanka](https://www.patrickvoillot.com/wp-content/uploads/2021/03/sapphirine-taille-ovale-sri-lanka72.png)
sapphirine
It takes its name from its blue color, recalling the sapphire. It was discovered in Greenland in 1819 .