![orange enstatite of Africa oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/enstatite-ovale-afrique182.png)
Capricorn
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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![orange enstatite of Africa oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/enstatite-ovale-afrique182.png)
![dioptase from Zaire cut in cabochon](https://www.patrickvoillot.com/wp-content/uploads/2021/03/dioptase-cabochon-zaire189.png)
![rock crystal from Perou](https://www.patrickvoillot.com/wp-content/uploads/2021/03/quartz-cristal-de-roche-perou207.png)
rock crystal
The name quartz comes from a slavic word meaning “hard”. Rock crystal comes from the Greek “krystallos” meaning ice, because the ancients believed that it was “eternal ice”. It is a mineral, often regarded as a rock as it is widespread in various aspects and
![rose carved in coral from Torre del Greco, Italy](https://www.patrickvoillot.com/wp-content/uploads/2021/03/corail-rouge-rose198.png)
coral
For the geologist, the mineralogist and the gemologist, it is neither a mineral or a fossil, or even a rock. This is the central limestone axis around which small polyps have developed, they secrete it and shelter there. These are animals of the Coelenterata phylum
![cabochon of silicious chrysocolla](https://www.patrickvoillot.com/wp-content/uploads/2021/03/chrysocolle-siliceux-bleu-cabochon-usa207.png)
chrysocolla
Its name, of the masculine gender, comes from the Greek “khrusos” : gold, and “kholla”: glue, referring to the fact that this mineral was used powdered to solder gold. It has been called “the little sister of turquoise” because of its alikeness. The rock of
![yellow chrysoberyl from Sri Lanka oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/chrysoberyl-taille-ovale-sri-lanka218.png)
chrysoberyl
Known since antiquity as a “golden beryl”, its name derived from the Greek “khrusos” for gold. Two popular varieties are appreciated gems: the golden yellow variety and the red / green which is called alexandrite. Most chrysoberyls are golden – yellow to brown – green