Dino gastroliths, gizzard stone, Utah

Description

Dino gastroliths, gizzard stones.
Certain dinosaurs used gastroliths in their digestive system to help aid in the grinding of food.
Over 3 lbs. 9 pieces
Not scientifically identified as gizzard stones, but the evidence points that way.
Old stock, found in an area known to frequent dinosaurs, and definitely not rock
native to the area it was found.
I believe that these are what I've listed them as.  The old guy I got them from knew his rocks.