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This polished Polyhedroid Agate specimen pair shows muted light to dark blue-grey agate and crystal rings, with an open vug in the center. One half shows a fused chamber with additional banding and druzy center.
Dimensions:
4cm x 1.5cm (3cm deep)
5cm x 1.6cm (2cm deep)
Total weight: 1.3oz
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.