Green Chalcedony 10mm Round - 15-16 Inch Form It is considered a precious

It is considered a precious Opal

brown to golden-yellow hydrous potassium iron titanium silicate mineral

It may be red

This Fire Opal contains both Opal and the rhyolitic host material in which it is formed

” The orange color is attributed to the presence of hematite or goethite within the rock

Green Chalcedony 10mm Round - 15-16 Inch Form It is considered a preciousBlue 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.