LEGO Medium Stone Gray Tile 2 x 2 Round with Big Eye with Bottom Stud Holder (14769 / 19673)

LEGO Medium Stone Gray Tile 2 x 2 Round with Big Eye with Bottom Stud Holder has been used in at least 5 LEGO sets over the past 9 years, since it was first used in 2015. It has a design ID of 19673 which can usually be found molded into the bottom of the part.