BST109pr Blue Star Thunderegg Specimen Pair Wack N' Crack This is a polished specimen

This is a polished specimen featuring banded agate in colors of yellow

ellipsoids

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

This is the pair to SWZ168jr

muted reds to brown

BST109pr Blue Star Thunderegg Specimen Pair Wack N' Crack This is a polished specimenThese polished halves of a large Blue Star Thunderegg show two fused open cavities revealing botryoidal chalcedony formations coated in sparkling druzy, with one half having secondary mineral growth over the small crystals and the other having a small hole from the cavity extending all the way to the edge of the crust. The open cavities are lined with agate showing light blue feathery banding, and have many distinct pointed star points that extend