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A polished Polyhedroid Agate specimen featuring dark, muted yellow, and very dark blue-gray to black banding, with two shallow open vugs. UV reactive.
Dimensions:
6.3cm x 2.6cm (1.4cm deep)
Weight: 0.6oz
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.