Black & white polymer clay is striped and then cut into 1" diameter circles.  Black clay with thin white lines is lightly marbled and then cut into a 0.75" diameter circle before being sealed in resin.  The pieces are connected and the earrings use silver-plated fishhook earwires.  The earrings are 2.25" long.  
 
All metal used is hypoallergenic, nickel-free, and is sterling silver, silver or gold-plated, or stainless steel unless noted otherwise. Every item is handcrafted, custom-made, nothing mass-produced.