Black Glass 12 x 15 mm Cushion Cut Square Magnetic Non Pierced Clip On Earrings

I hand picked these beautiful super low dome buff top rectangle glass cabochons. Each stone is 12 x 15 mm in diameter by 4 mm high.
They are highly polished and look like black onyx.
Each earring is held on with one 5 mm nickel plated neodymium magnet attached to the earring and one 8 x 3 mm enamel painted ceramic magnet 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.