![green chrome titanite cushion cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/titanite-sphene-chromifere45.png)
monoclinic
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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![green chrome titanite cushion cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/titanite-sphene-chromifere45.png)
![staurolite from Brazil oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/staurotide-ovale-bresil56.png)
staurolite
It is named after his twins very frequently cross-shaped: the twin cross of St. Andrew (60 degrees) and that of the Greek cross (90 degrees), in Greek “stauros” means cross and “lithos”, stone, hence its name “cross stone”. Another twin “in wheel”shape exists in the
![African serpentine oval cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/serpentine-taille-ovale-afrique-15.png)
serpentine
Serpentine, or rather the serpentines, is a group of over 20 minerals quite difficult to differentiate the one from the other, the best known of whom are : antigorite, chrysotile and lizardite. These Phyllosilicates are weathering products of magnesium silicates. The Ophite, sometimes called “ophite
![scorzalite round cut](https://www.patrickvoillot.com/wp-content/uploads/2021/03/scorzalite-taille-rone10.png)
scorzalite
Discovered in 1957 in Brazil (Corrego Firo pegmatite, Linopolis, Doce valley, Minas Gerais). Its name honors the Brazilian geologist who discovered it: Evaristo Penna Scorza (1899-1969).
![scolecite cut in cabochon](https://www.patrickvoillot.com/wp-content/uploads/2021/03/scolecite-cabochon8.png)
![oval cut sapphirine from Sri lanka](https://www.patrickvoillot.com/wp-content/uploads/2021/03/sapphirine-taille-ovale-sri-lanka72.png)
sapphirine
It takes its name from its blue color, recalling the sapphire. It was discovered in Greenland in 1819 .