BST107pr Blue Star Thunderegg Specimen Pair From Mexico They generally feature yellow

They generally feature yellow

75" x 4" x 1

This polished specimen shows tightly banded yellow agate with several little eye formations

The very back edge of the nodule shows the agate and quartz rough

BST107pr Blue Star Thunderegg Specimen Pair From Mexico They generally feature yellowThese polished halves of a Blue Star Thunderegg show an open cavity revealing botryoidal chalcedony coated in sparkling druzy, inside gray and brown rhyolite and clear to blue chalcedony with little hints of feathery banding. The chalcedony shows green fluorescence under 365nm ultraviolet light. Polished Surface: 9. 2cm x 7cm and 9. 4cm x 7. 2cm Each half approx. 1. 25" deep 1lb 1. 2oz Blue Star Thundereggs are a recent find out of Sonora, Mexico.