![cabochon cut bustamite from Brazil](https://www.patrickvoillot.com/wp-content/uploads/2021/03/bustamite-cabochon-bresil226.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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![cabochon cut bustamite from Brazil](https://www.patrickvoillot.com/wp-content/uploads/2021/03/bustamite-cabochon-bresil226.png)
![gem brookite crystal from Pakistan](https://www.patrickvoillot.com/wp-content/uploads/2021/03/brookite-cristal-pakistan228.png)
![yellow baryte from Italia](https://www.patrickvoillot.com/wp-content/uploads/2021/03/baryte-taille-fantaisie-jaune-italie240.png)
![baguette cut adamite from Mexico](https://www.patrickvoillot.com/wp-content/uploads/2021/03/adamite-baguette-mexique269.png)
adamite
Described in 1886 by Charles Friedel who named it after the French mineralogist Gilbert Joseph Adam who found this mineral. Its color depends on the metallic ions present : cuproadamite colored by copper is green, manganoadamite colored by manganese is pink-purple such as cobaltoadamite and
![cabochon of actinolite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/actinolite-cabochon270.png)
actinolite
Actinolite belongs to the amphibole group, discovered in 1794 by the mineralogist Kirwan. The name actinolite is derived from the Greek “aktis”, meaning “beam” or “ray” and “lithos”, meaning “stone”; referring to the mineral’s radiating fibrous nature. The name “actinolite” was given by René Just