Resin with blue mica powder and white mica powder is poured so they "melt" into each other and molded into a 1" diameter circle with an 0.5" circular cutout at the top.  A liberal amount of large silver glitter is added to create the pendant.  The pendant uses an 0.75" long silver-plated pinch bail and hangs from a 2mm silver-plated link chain with a lobster claw closure.  The necklace is 22" long.  
 
All metal used is hypoallergenic, nickel-free, and either sterling silver, silver, or gold plated or stainless steel unless noted otherwise in the description.  Every item is handcrafted, nothing mass-produced.