![witherite round cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/witherite-ronde24.png)
uneven
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 …
actualités
Categories
![witherite round cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/witherite-ronde24.png)
![wavellite crystals from United States](https://www.patrickvoillot.com/wp-content/uploads/2021/03/wavellite-cristaux-usa27.png)
![vivianite emerald cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/vivianite-taille-emeraude29.png)
![villiaumite crystal from Namibia](https://www.patrickvoillot.com/wp-content/uploads/2021/03/villiaumite-cristal-namibie30.png)
villiaumite
Its name honors Maxime Villiaume, French soldier and explorer who made collections of minerals from Madagascar and Guinea. The villiaumite was found in its samples coming from Guinea (Rouma Island). For gemologists: watch this stone has an significant polarization abnormality, while being isotropic.
![vesuvianite from Kenia](https://www.patrickvoillot.com/wp-content/uploads/2021/03/vesuvianite-kenya31.png)
vesuvianite
Its name comes from the Vesuvius (Italy) where it was discovered, it is also called vesuvienne, idocrase, wiluite (form the Wilui River in Yakutia, Russia). The californite variety, discovered in 1963 by the famous mineralogist Kunz, is a massive, persistent and green variety of vesuvianite
![variscite cabochon from United States](https://www.patrickvoillot.com/wp-content/uploads/2021/03/variscite-cabochon-usa33.png)
variscite
It recalls the old name of Vogtland (southern Saxony, Germany) called Variscia in Latin, where it was discovered in the valley of the Mess. A massive variety, found in the United States (Nevada,) with interpenetration of veinlets or quartz nodules and chalcedony, is called “amatrix”