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POL136JR Polyhedroid Agate Specimen


This polished Polyhedroid Agate specimen features alternating bands of crystal and agate, in translucent and milky white with black dendrites visible on the surface and along the agate banding.

6cm x 3.6cm polished surface, 4.5cm deep

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 space between large crystals of calcite or aragonite. They uniquely feature naturally flat surfaces in a variety of angles.