Only one available / one of kind / Double layer necklace . Genuine black Lava rock 10 mm beads (3) can be use for oil diffusing & oval shape red brown agate gemstone pendant on second layer . Stainless steel chains ( first layer is 15 inch & second is 18.5 , I also added a two inch extention on the back to adjust ) If you need longer than that lmk . Handmade by me 🙂 boho / bohemian / hippie / bohochic / gems / gemstones / natural healing stones / stylish / gift / oil diffuser / valentine