BST107pr Blue Star Thunderegg Specimen Pair Obsidian between 27 mm - 4

between 27 mm - 4 mm thick

Chapter 9: Strange Geodes of Indiana

DRG142 Drilled Tabasco Geode features translucent blue-gray banded agate with a blue-gray druzy pocket

INT132db Intarsia Drilled Bead

An illuminating alphabetical journey through the mineral kingdom

BST107pr Blue Star Thunderegg Specimen Pair Obsidian between 27 mm - 4These 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.