Vintage Carved Smokey Black with Applied Inlayed Silver Tone Metal Heart Pendant

vintage carved stone pendant necklace step down double heart shape stone is a smokey black / dark gray applied and inlaid silver accent ~ I don't know if this is 'real' silver or not very unique I have added a brand new black fabric cord necklace with a silver tone lobster claw clasp measurements: cord ~ approx 17" + 2" extender pendant ~ approx 1" including bale