Our Oval Black Onyx cabochons are cut from natural black onyx rough. Most Black Onyx is dyed to assure completely uniform blackness. These calibrated stones are extremely well cut and polished. Black onyx has traditionally been used to banish grief and enhance self control. Great for your jewelry piece onyx is also very durable, coming in at 61/2-7 on the Mohs scale.
We sell these stones individually in 18 x 9MM, 16 x 8MM,14 x7MM, and 6 x4MM.