Photo -- See Caption Below

Biface [right]??Projectile point [left??]
Ancestral Pueblo
Pueblo III - Pueblo IV AD 1200 - 1550
For at least 12,000 years, obsidian deposits in the Bandelier area were used by prehistoric peoples to make cutting or piercing tools like this obsidian biface on the right. The term “biface” indicates that the craftsman chipped it to be sharp along both long edges. During the Ancestral Pueblo period, obsidian became an important item for trade with groups as far away as Texas and Oklahoma.
Jemez obsidian. L 10, T 4.5 cm [L 4, W 1 ¾ inches]
Bandelier National Monument, BAND 390