Castroville Dart Point From Hamilton County Texas. Edwards Plateau Tan Chert. Late Archaic to Woodland Period. 4000 - 1500 B.P. This Arrowhead is not broken. It was chipped into this shape by the Indian who used it. 1 3/4" X 1 1/4". Free Shipping. AACA. Guaranteed to be authentic and without modern alteration. Items may be returned for any reason, or no reason, within 30 days of delivery.