Three large 1/4" diameter silver-plated jump rings are connected with small silver-plated jump rings from which a 6mm x 6mm cobalt blue Swarovski crystal cube is hung.  The earrings use leverback earwires and 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.