![cushion cut green apatite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/apatite-verte-coussin248.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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![cushion cut green apatite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/apatite-verte-coussin248.png)
![oval cut andalusite of Brazil](https://www.patrickvoillot.com/wp-content/uploads/2021/03/andalousite-bresil253.png)
andalusite
Identified by Delametherie in 1798, it was named after a Spanish province, Andalusia, where it was found, near Almeria. Chiastolite the variety, also known as “Stone Cross” is a variety of opaque white to gray andalusite, which comes in elongated prisms which, when cut perpendicular
![emerald cut amethyst from Madagascar](https://www.patrickvoillot.com/wp-content/uploads/2021/03/amethyste-violette-madagascar-taille-emeraude257.png)
![cabochon cut allanite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/allanite-cabochon262.png)
allanite
Named by Thomas Thomson in 1810 after the scottish mineralogist Thomas Allan. This is a mieral close to epidote and there are 3 types of allanite based on their concentration in cerium, lanthanum, yttrium (rare earth element). The lanthanum variety is radioactive.