This round black onyx cabochon is a great choice for adding depth and drama to custom jewelry designs. A staple color in jewelry designs that complements nearly any stone, this cab is ideal for one-of-a-kind pendant and bracelet designs.

Onyx, a type of opaque chalcedony, is naturally black and is generally dyed to achieve a more uniform color—it is the most common black gemstone and is popular for creating a striking centerpiece and for adding contrast to designs that include lighter and/or more colorful stones. It is a hard stone and takes a high polish; since ancient times, onyx has been a favorite stone for carving.

Rio Grande's calibrated cabochons are calibrated to fit Rio Grande's corresponding size bezel cups, so you know the size you buy will fit properly every single time.

  • Cutting Center : China
  • Stone(s) shape : Round
  • Material : Onyx
  • Stone type : Natural
  • Color : Black
  • Mohs hardness : 6.5–7
  • Refractive index : 1.53–1.54
  • Enhancement : Dyed (D)
  • Specific gravity (g/cm3) : 2.55–2.7
  • Stone type : Natural

Please Note: • Care: Clean with warm, soapy water. Ultrasonic and steam cleaning are usually safe.

Catalog page: 2019-2020 Gems and Findings & Display and Packaging Catalog p.751