Authentic Vintage 1970'S Long Large Graduated Black Jet Necklace

This is a vintage 1970s long large black jet necklace. The necklace measures 18 1/2" long closed and has an adjustable lobster clasp so it can be doubled around the neck. I am selling the necklace for a friend that has owned it for many years. The jets are ice cold so I know that they are excellent quality. I have 3 authentic other black jet shorter necklaces that I will be listing from the same owner. Good stones and crystals should be cold, not warm to the touch. Please e-mail me with any questions? Buyer pays $5 shipping in the USA. Please see my other listings.