POL627 Polyhedroid Agate 25 with a chalky bumpy exterior

with a chalky bumpy exterior

These Petoskey Stone pebbles are polished on the top to reveal the hexagonal pattern of fossilized coral

Most slabs are rather small

This specimen features white and brown banding with white water banding

POL627 Polyhedroid Agate 25 with a chalky bumpy exteriorA polished Polyhedroid Agate specimen featuring crystal filling surrounded by muted blue gray to black banding, yellow moss agate, and white coating near the flow channel. Faintly UV reactive. Dimensions: 5. 5cm x 2. 3cm (1. 3cm deep) Weight: 0. 6oz Polyhedroid Agates were found in Paraiba, Brazil, but are now unavailable. They are a unique formation of agate, featuring naturally flat surfaces at a variety of different angles. They are believed to