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POL130JR Polyhedroid Agate Specimen


This polished Polyhedroid Agate specimen features deep blue, almost black agate, that briefly blends to magenta then golden yellow. A flow channel opens up into a vug in the center. 

7.3cm x 3.1cm polished surface, 6.7cm 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.