Presentation :
Names) :
Andalusite: Viridine, Chiastolite.
Etymology :
Named after the province of Andalusia (Spain) where it was discovered (Delametherie, 1789).
Group, ...
Presentation :
Names) :
Andalusite: Viridine, Chiastolite.
Etymology :
Named after the province of Andalusia (Spain) where it was discovered (Delametherie, 1789).
Group, ...
Presentation :
Carnelian is a red variety of chalcedony, which is itself a cryptocrystalline variety of quartz. The formula of this mineral family is SiO2. Carnelian owes its color to hematit...
Presentation :
Carnelian is a red variety of chalcedony, which is itself a cryptocrystalline variety of quartz. The formula of this mineral family is SiO2. Carnelian owes its color to hematit...
Presentation :
Carnelian is a red variety of chalcedony, which is itself a cryptocrystalline variety of quartz. The formula of this mineral family is SiO2. Carnelian owes its color to hematit...
Presentation :
Carnelian is a red variety of chalcedony, which is itself a cryptocrystalline variety of quartz. The formula of this mineral family is SiO2. Carnelian owes its color to hematit...
