POL133JR Polyhedroid Agate Specimen Drilled Geodes and black plumes in translucent

and black plumes in translucent agate

and burnt sienna chalcedony with tiny pockets of druzy

This polished Coyamito Agate specimen features pale blue-gray banded agate in the center

and over time chalcedony formed around

The top/front side is slightly polished and sealed to prevent further oxidation

POL133JR Polyhedroid Agate Specimen Drilled Geodes and black plumes in translucentThis polished Polyhedroid Agate specimen features alternating bands of quartz and banded agate in shades of blue and black. The edges have yellow moss or inclusions, and the center opens to a vug that goes through to the back of the agate. 10. 8cm x 4. 6cm polished surface, 4cm deep 6. 7oz Polyhedroid Agates were found in Paraiba, Brazil, but are now unavailable. They are a pseudomorphic formation of agate, believed to have formed in the negative