SON359c Sonora Dendritic Cabochon Geodes Inside the quartz is blue

Inside the quartz is blue

These polished halves of a large Blue Star Thunderegg show two fused open cavities revealing botryoidal chalcedony formations coated in sparkling druzy

Hardness on the Mohs Scale is 7

Made of silica with the chemical formula for quartz is SiO2

Del Norte Plume Agate creates this foreground

SON359c Sonora Dendritic Cabochon Geodes Inside the quartz is blueThis Sonora Dendritic cabochon has a smooth matte finish. It features a gray and mauve background with brecciated patterning, dark brown dendrites, and little hints of sand and off white. 30mm x 29mm From Sonora, Mexico, this stone is most likely a dolomite as it is softer than jasper and rhyolite. Called Sonora Dendritic for its prevalent dendrites, it typically shows a blue gray or tan colored background with dark maroon to mauve dendrites and