Object description

Artifacts used as grinders are common in prehistoric archaeological sites. They are usually fixed rocks with elongated grooves resulting from the smoothing friction made by other tools, spearheads, arrows, edges, etc. However, those sharpeners/grinders made in shells are rare, even more if they are found in sites in the interior of the country. This mollusk valve has grooves resulting from its use in polishing and smoothing, by rubbing some elongated object. As far as we know, it is an exclusive production of peoples of the Una Tradition, preserved in a cave site, places that are generally used for ceremonial purposes.