BST120 Blue Star Thunderegg Specimen Tumbled Stone the area between the calcite

the area between the calcite and the Bentonite transformed into aragonite which is the dark brown crystal layer

5mm - 9mm thick

Its pair is CHI198jr

300mm diameter (11

BST120 Blue Star Thunderegg Specimen Tumbled Stone the area between the calciteThis polished Blue Star Thunderegg shows brecciated rhyolite filled with translucent agate with gentle feathery bands in white to pale blue. The surface is scattered with tiny open vugs that reveal hints of crystal druzy. The chalcedony shows green fluorescence under 365nm ultraviolet light. Polished Surface: 9. 5cm x 5cm Approx. 1. 25" deep 5. 6oz Blue Star Thundereggs are a recent find out of Sonora, Mexico. They have a dark grayish to reddish brown