100 percent functional and working , print friendly ring size 8.5 [for resizing it messege me , will be done in minutes without any charges]
for opening you press a pin in the small hole on the left
all of the pieces can be printed and casted in one piece , just print the :chess pieces: file al together with a bottom plate. maybe if possible cast the one of the chess pieces set in gold or gold plate them so you can distingiush, weights and dimentions are all in the pictures .
18 round gems of size 1.4 mm on each side , total 72 gems of 1.4 mm