Explore Designs › Black Onyx and Lava Stone Necklace 1 / 3 Image 1 of 3 Image 2 of 3 Image 3 of 3 Black Onyx and Lava Stone Necklace $125.00 sold out Black Onyx set in Sterling Silver on a 24” sterling chain with a black Lava Stone. Sold Out Added! Black Onyx set in Sterling Silver on a 24” sterling chain with a black Lava Stone.