BST110pr Blue Star Thunderegg Specimen Pair Copper The STEAM Guidebook helps you

The STEAM Guidebook helps you identify your Fossils and learn nifty facts

ranging from slightly orange to deep brick to pinks

creating a boulder for the tree to stand on

featuring repeated egg patterning and horizontal bands

BST110pr Blue Star Thunderegg Specimen Pair Copper The STEAM Guidebook helps youThese polished halves of a Blue Star Thunderegg show two fused open cavities revealing botryoidal chalcedony formations coated in sparkling druzy, inside brecciated brown and gray rhyolite and translucent to pale blue gray chalcedony with hints of peach inclusions. The chalcedony shows green fluorescence under 365nm ultraviolet light. Polished Surface: 9cm x 7. 5cm and 9. 2cm x 7. 5cm Approx. 1" and 1. 25" deep 1lb 0. 5oz Blue Star Thundereggs are a