![hessonite garnet from Sri Lanka](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hessonite-sri-lanka168.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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![hessonite garnet from Sri Lanka](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hessonite-sri-lanka168.png)
![emerald cut grandidierite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/grandidierite-taille-emeraude169.png)
grandidierite
ck_admin
March 24, 2021
Discovered at Andrahomana, near Fort Dauphin in Madagascar. Its name honors the French explorer Alfred Grandidier (1836-1912).
![gilaite in quartz cushion cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/gilalite-quartz-coussin170.png)
![gaylussite crystals from Ambola lake in kenya](https://www.patrickvoillot.com/wp-content/uploads/2021/03/gaylussite-lac-amboli-kenya172.png)
gaylussite
ck_admin
March 24, 2021
Identified in 1826 in Venezuela, its name honors the French chemist Gay-Lussac (1778-1850).
![emerald cut gaspeite from Australia](https://www.patrickvoillot.com/wp-content/uploads/2021/03/gaspeite-australie-taille-emeraude173.png)
![gadolinite emerald cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/gadolinite-taille-emeraude174.png)
gadolinite
ck_admin
March 24, 2021
Appointed in 1800 in honor of the Finnish mineralogist Johan Gadolin (1760-1852) who isolated the Yttrium element in 1797. This rare earth is used to imitate the diamond, synthetic zirconia oxide, to stabilize it in a cubic form at atmosphere temperature. Gadolinium is one of