Black Obsidian Volcanic Glass 18 mm Round Magnetic Non Pierced Clip On Earrings

I hand picked these beautiful super low dome buff top obsidian volcanic glass cabochons. Each stone is 18 mm in diameter by 2.5 mm thick.
They are highly polished and are look beautiful.
Each earring is held on with two 13 by 2.5 mm enamel painted ceramic magnets, one attached to the earring and one that goes behind the ear to hold it on.

Need extra or stronger magnet backs? They are listed here:  

https://laurawilsongal.com/products/extra-magnetic-earring-and-eyeglass-holder-backs

If you have misplaced your metric ruler, remember that 13 mm=1/2 inch.

If you are allergic to nickel, order only earrings that have both enamel painted ceramic magnets front and back since the neodymium magnets are plated with nickel.