BST102pr Blue Star Thunderegg Specimen Pair Malachite Kit includes a rock classification

Kit includes a rock classification chart and 12 real rocks and minerals

Clear Quartz

Turkish Stick Agate polished cabochon with brown intersecting stick-like formations inside very clear agate

This polished specimen pair features pale blue

5 - 3 on the Mohs scale

BST102pr Blue Star Thunderegg Specimen Pair Malachite Kit includes a rock classificationThese polished halves of a Blue Star Thunderegg show botryoidal chalcedony coated in sparkling crystal druzy, inside feathery banded agate in clear to pale blue hues. The shape of the chalcedony comes to several pointed edges like a star, with brown rhyolite making up the rest of the egg. The chalcedony shows green fluorescence under 365nm ultraviolet light. Polished Surface: 6. 6cm x 5. 5cm and 6. 8cm x 5. 6cm Approx. 1" and 1. 5" deep 9. 1oz Blue