![hibonite crystal from Madagascar](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hibonite-cristal-madagascar158.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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![hibonite crystal from Madagascar](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hibonite-cristal-madagascar158.png)
![heterosite of La Vilatte in Chanteloube in France](https://www.patrickvoillot.com/wp-content/uploads/2021/03/heterosite-la-vilatte-chanteloube-france159.png)
heterosite
ck_admin
March 24, 2021
Its name comes from the Greek “hetero”, other, because on the same deposit it was the second mineral containing manganese to be discovered. It forms a group with purpurite, the iron pole of the phosphate is the heterosite and purpurite the manganiferous pole.
![herderite crystal from Minas Gerais in Brazil](https://www.patrickvoillot.com/wp-content/uploads/2021/03/herderite-cristal-minas-gerais-bresil161.png)
![faceted hematite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hematite-ovale162.png)
![hauyne oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/hauyne-taille-ovale164.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).