Thunder eggs come from cavities in volcanic rocks that have filled in with agate, jasper, opal or other materials. This thunder egg from Richardson’s Ranch filled in with blue agate.
Carnelian Flames
Carnelian ranges in color from yellow-orange to deep brownish-red. It varies from semi-opaque to highly translucent and can include drusy quartz and small crystals.
Black Agate Flames
Black agate is a variety of chalcedony, a mineral from the quartz family.
