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This very thin polished Polyhedroid Agate pair shows muted blue-gray to almost-black agate banding. UV reactive.
Dimensions:
6.7cm x 0.6cm (3.8cm deep)
6.8cm x 0.6cm (2cm deep
Total weight: 1.4oz
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.