Superb! very rare! Pre Columbian Mexico Aztec Museum Piece Rare Pedernal Flint Stone quartz Chisel.This is a authentic piece found in excavations in Mexico in the late 1960's and collected by Dr. Robert Gonzalo Phd in Anthropology.A piece that will make a collector very very happy!.Provenance:From the Estate of Dr. Robert Gonzalo Phd in Anthropology.Measurements:The chisel measures approx. 6-1/2" (16.5cm ) long x approx. 3/4" (1.90cm) Wide. Antique Pre Columbian Mexico Aztec Peder...nal Flint Stone Quartz Chisel Museum Pc.