Lapidary Tool Kit Lapidary Abrader Chaco Anasazi Site number, Bc 50 AD 900-1150 Sandstone. L 8.5, W 7.9, T 0.7 cm Chaco Culture National Historical Park, CHCU 1697 Drill Chaco Anasazi Site number, 29SJ 1612 AD 700-1200 Chert. L 4.5, W 0.7-1.5, T 0.6 cm Chaco Culture National Historical Park, CHCU 4379