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This polished Polyhedroid Agate specimen pair shows agate banding in shades of muted blue-gray to black, with a crystalline center coated in white. Strong UV reaction.
Dimensions:
9cm x 3.3cm (4.9cm deep)
8cm x 3.4cm (5.5cm deep)
Total weight: 12.8oz
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 have formed in the negative spaces between large crystal blades of calcite or aragonite, and can occasionally feature multiple "chambers" where those blades eroded and adjacent agates fused together.