Based on our mid size coins these “stones” are thicker and have a smooth concave center. Machined from zirconium and then polished to a FLAWLESS mirror finish! Zirconium is a soft(ish) inert silver metal that will not patina. Our coins were heat treated before assembly which puts a super hard protective oxide layer on the surface that is jet black in color. Heavier than titanium but lighter than stainless steel lots of customers feel zirconium object have a perfect weight to size ratio.

Size: diameter = 1.35” , Height = .52”

Weight: 66 Grams

Ships from New Jersey