BST120 Blue Star Thunderegg Specimen Tumbled Stone and dark blue-green jasper with

and dark blue-green jasper with some partial

blue goldstone's color is created by using cobalt instead of copper (used in goldstone) combined with molten glass

5mm - 9mm thick

This polished Agua Nueva Agate cabochon features white and pale rose agate showing the top of a banded layer with botryoidal formation

The main lap is constructed from high quality steel

BST120 Blue Star Thunderegg Specimen Tumbled Stone and dark blue-green jasper withThis 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