Blue Chalcedony (Marbled) 8mm Round 15-16 Inch Stone Type_Multi Tourmaline but has been used historically

but has been used historically to describe the transparent variety

Azurite is a Copper carbonate mineral that forms in masses

Blue Chalcedony is a naturally occurring soft blue translucent stone

Jasper has a long and illustrious history

Blue Chalcedony (Marbled) 8mm Round 15-16 Inch Stone Type_Multi Tourmaline but has been used historicallyBlue Chalcedony is a naturally occurring soft blue translucent stone. It is a member of the Quartz family, a form of silica with a cryptocrystalline structure that incorporates Moganite along with the Quartz. Known in antiquity as the Speakers Stone, it is believed to have been worn Cicero, the great Roman orator.