![cut augite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/acmite-augite0.png)
brown
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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![cut augite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/acmite-augite0.png)
mother-of-pearl
Mother-of-pearl or Nacre is the substance that constitutes the inner part of the shell of certain mollusks, its name comes from the Latin “ nacrum “, which was used to describe white matter with iridescent reflections. It consists of a mineral part of calcium carbonate
![yellow zircon of Sri Lanka brilliant cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/zircon-taille-diamant-sri-lanka19.png)
zircon
Its name comes from the Arabic “zargoun” muting in “jargon”, meaning vermilion. It is known since antiquity, but under different names. It may be colorless (rare), but also yellow, brown, orange, blue to blue-violet (called starlite) … and mostly brown green and dark red, the
![wulfenite from U.S. square cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/wulfenite-taille-carree-usa32.png)
![wolframite emerald cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/wolframite-taille-emeraude23.png)
wolframite
Its name comes from the german, “ wolfram” being the name of tungsten, which is its main component. The hubnerite variety is rich in manganese, of a rather red color, transparent and in slices, it was named after the german Adolph Huebner. The ferberite variety
![emerald cut willemite](https://www.patrickvoillot.com/wp-content/uploads/2021/03/willemite-taille-emeraude25.png)