16” Black Puff Heart Necklace with 3” Extender

Used - 16” Black Puff Heart Necklace with 3” Extender 16” necklace with 3” extender. I have no idea what the chain is made of. The heart is beautiful on the neck and has black rhinestones all over front. Measurements of heart are pictured (approximately 1 1/2” H x 1 1/2” W). Necklace is very old but in good condition. There are a few places where the silver is showing through but you have to look hard to see it.