Oval 16 x 12mm High-Dome Black Onyx Cabochon Stone, Sold By each | 77793

Onyx, a type of opaque chalcedony, occurs naturally in black and is generally dyed to achieve a more uniform color. Premium high-dome cabochons are much more substantial and increase the profile of the stone in your design. Stone shape: Oval Stone size: 16 x 12mm Color: Black Mohs hardness: 6.5–7 Treatment: Dyed (D) please note: Care: Avoid heat and harsh chemicals. Ultrasonic and steam cleaning are usually safe.^