![yellow cushion cut tectite from Lybia](https://www.patrickvoillot.com/wp-content/uploads/2021/03/tectite-verre-de-lybie126.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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![yellow cushion cut tectite from Lybia](https://www.patrickvoillot.com/wp-content/uploads/2021/03/tectite-verre-de-lybie126.png)
![carved lapis lazuli from Afghanistan](https://www.patrickvoillot.com/wp-content/uploads/2021/03/lapis-lazuli-afghanistan-intaille-chine140.png)
lapis lazuli
This is a rock of variable composition containing from 35 to 40% of lazurite (which gives it the beautiful blue color), sodalite, some nosean, some hauynite. Its name comes from the Arabic for “blue”. Azure blue color, greenish blue, dark purple, caused by sulfur, and
![oval cut johachidolite from Mogok in Burma](https://www.patrickvoillot.com/wp-content/uploads/2021/03/johachidolite-mogok-birmanie150.png)
johachidolite
It is named after the locality where it was discovered: Johachido District in North Korea. Recent discovery at Mogok in Burma of a variety of beautiful yellow-orange gem quality stones.
![blue jeremejevite from Erongo in Namibia](https://www.patrickvoillot.com/wp-content/uploads/2021/03/jeremejevite-ovale-erongo-namibie145.png)
jeremejevite
It honors the Russian mineralogist Pavel Vladimirovich Jeremejev (1830-1899) who has identified it in 1883 in Siberia.
![jet ( ignite ) Zuni fetish from United States](https://www.patrickvoillot.com/wp-content/uploads/2021/03/fetiche-zuni-jais-usa146.png)
jet
This is an organic material, a black variety of lignite containing 70% of carbon, resulting from the coalification of wood under anaerobic conditions (without oxygen) and under strong pressure, it is a fossil gem. Its name comes from old French “jayet” or “jaiet” or the
![imperial jade from Burma cut in cabochon](https://www.patrickvoillot.com/wp-content/uploads/2021/03/jade-imperial-birmanie147.png)
jade
In the nineteenth century, it was shown that the so-called “jade” actually consisted of two distinct minerals: The “Jadeite”, of the pyroxene family, is the hardest and most rare, it has a crystalline sound, its color varies from white to dark green, even lavender. The