Search our collections

Graziela Gems

Black Onyx Montanha Necklace

Introducing the Black Onyx Montanha Necklace, a stunning piece of jewelry that is sure to turn heads. This necklace features 8.41 carats of onyx, set in black ruthenium sterling silver. The pendant measures 18mm x 19mm and hangs from a 22″ 2mm round box chain. Whether you're dressing up for a special occasion or just looking to add a little bit of glamour to your everyday look, this necklace is the perfect choice.


  • Gemstone:  8.41 Carats of Onyx
  • Metal:  Black Ruthenium Sterling Silver
  • Measurements:  22″ 2mm Round Box Chain, Pendant Measures 18mm X 19mm

 If an item is out of stock, please allow 4-6 weeks for delivery

Gem sourcing + anti-slavery statement

The diamond industry has in the past been associated with conflict and exploitation, the industry has taken a number of pro-active steps to combat this, most notably in the form of the Kimberley Process (which certifies that diamonds originate from conflict free zones). Through our procurement and polishing division we are subject to rigorous requirements which set out the detailed standards that our procurement and polishing division is required to adhere to in order to maintain its status. Among other requirements there is a focus on supply chain management, provenance claims, child and forced labour and ethical standards generally.