carnelian crystalized /I found this crystalized carnelian at a dig in Washington this last weekend / Kalama, WA. I dug for 8 hours and got almost a full bucket of carnelians, agates, quartz and jasper. A lot of the carnelians had quartz crystals in the center, very cool.
A thunderegg is a nodule-like geological structure, similar to a geode, that is formed within a rhyolitic lava flow. Thundereggs are rough spheres, most about the size of a baseball (range >inch to a meter). They usually contain centres of chalcedony in the form of agate, jasper or opal, either uniquely or in combination. Also frequently encountered are quartz, selenite crystals, and other mineral growths and inclusions. Thundereggs usually look like ordinary rocks on the outside.