These earrings use 14mm round silver-plated bezels filled with bright red and white marbled polymer clay and then sealed in resin.  The bezels hang inside silver heart frames, 0.75" in diameter.  The earrings use silver-plated fishhook earwires and are 0.75" 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.