Bright blue tones with the occasional pop of green dominate this small cabinet Chalcedony over Chrysocolla aka Gem Silica. A natural space within the Chrysocolla is lined with a layer of translucent Chalcedony allowing the bright blue to pop through. . Ray Mine, Scott Mountain, Pinal County, Arizona, USA. 2.25" x 1.25" x 1.5", 1.5 oz.