This is a specimen featuring dark yellow, blue, and dark blue to black banded agate, with a small bit of white in the center. It has over six flat sides with fracturing that has been weathered already.

8.5 cm x 5.8 cm x 5.6 cm
11.5 oz

Polyhedroid Agates were found in Paraiba, Brazil, but are now unavailable. They are pseudomorphic formation of agate, forming in the negative space between large crystals of calcite or aragonite. They uniquely feature naturally flat surfaces in a variety of angles.