I just love the snake on this pieces, he is almost comical! The pin is gold gild on brass and is a nice weight, not too light. The banded agate is 1 1/4 inches across and almost 1 inch tall and is bezel set. The pin is 1 1/2 inches across. It is a nice dimensional piece and the glazed compartment at the back is ready for a picture of a loved one! C. 1850 and English in origin.