BST113pr Blue Star Thunderegg Specimen Pair Arrowheads Have fun exploring the details

Have fun exploring the details of the rocks and minerals with the included magnifying lens

Scan the QR code on the tube to view the whole list of possible tumbled stones inside

The term Schorl was in use before the 1400s

It also has dark marcasite coating some of the plumes

BST113pr Blue Star Thunderegg Specimen Pair Arrowheads Have fun exploring the detailsThese polished halves of a Blue Star Thunderegg show an open cavity of botryoidal chalcedony coated in sparkling crystals, with pointed edges extending to the outer edges of the nodule. The rest of the egg is made from gray and brown rhyolite, with patterning similar to petrified wood that radiates outward from the agate. The chalcedony shows green fluorescence under 365nm ultraviolet light. Polished Surface: 8. 8cm x 6. 5cm and 8. 9cm x 6. 7cm