This is a beautiful piece from Stringin' Along with Me! The heart is handcrafted from silver-toned repurpsed wire and a gold-filled chain is included. I love the size of this piece, it's perfectly petite at 3/4" across. 
 
Here's more from this talented maker! 
 
"Stringin’ Along with ME is a line of handcrafted jewelry created using the recycled strings from guitars, bass guitars and other stringed instruments. Each piece is designed and created with a handforged element that allows the integrity of the string to be maintained and highlighted."