Green Chalcedony 10mm Round - 15-16 Inch Dendritic Black Opal orange and rust are due

orange and rust are due to traces of hematite within the stone

or black and can be distributed randomly or in bundles or star-like formations

blue-greens and greens swirled with yellow-green

in Karelia

Citrine is a transparent Quartz

Green Chalcedony 10mm Round - 15-16 Inch Dendritic Black Opal orange and rust are dueBlue 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.