BST123pr Blue Star Thunderegg Specimen Pair Lapis This specimen is a polished

This specimen is a polished slab

8 cm x 6 cm

and hints of red beneath

red plumes in translucent agate

BST123pr Blue Star Thunderegg Specimen Pair Lapis This specimen is a polishedThese polished halves of a large Blue Star Thunderegg show an open cavity revealing botryoidal chalcedony formations covered in sparkling crystal druzy. Outlining the cavity is translucent agate with white and pale blue feathery bands, inside gray and brown rhyolite with patterning similar to petrified wood. The chalcedony shows green fluorescence under 365nm ultraviolet light. Polished Surface: 13. 5cm x 8. 4cm and 14. 7cm x 8. 4cm Approx. 2. 25" and