Black Glass 15 mm Round Magnetic Non Pierced Clip or Pierced Earrings

I hand picked these beautiful super low dome buff top glass cabochons. Each stone is 15 mm in diameter by 2.5 mm thick.
They are highly polished and look like black onyx.
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.
Also available in pierced with surgical steel posts and nickel free backs.

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.