POL133JR Polyhedroid Agate Specimen Drilled Geodes and over time chalcedony formed

and over time chalcedony formed around

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

DRG139 Drilled Tabasco Geode features translucent agate with a large druzy pocket

Polished black obsidian pyramid with a flat base

POL133JR Polyhedroid Agate Specimen Drilled Geodes and over time chalcedony formedThis 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