Skip to main content
Early Sale Starts Soon.Sign Up
Introducing Holiday Gift Shop.Shop Now
Free Express Shipping On All Orders Over £100
Mejuri logo
  • Black Onyx Square Signet Ring: A gold ring featuring a striking black onyx stone, perfect as a bold fashion accessory.
  • Close-up of a man's hand wearing the Black Onyx Square Signet Ring, highlighting its bold, square design and elegant onyx stone.
  • Black Onyx Square Signet Ring on a man's hand, highlighting the intricate design and elegance of the ring against the skin.
  • Black Onyx Square Signet Ring: A gold ring featuring a prominent black square centerpiece, offering a bold and elegant fashion statement.
  • Black Onyx Square Signet Ring featuring a black stone set in a gold band, perfect for a sophisticated and stylish look.
  • Black Onyx Square Signet Ring, featuring a polished silver band and a prominent black square stone, perfect for a bold, elegant statement.
  • Man wearing a denim jacket showcasing the Black Onyx Square Signet Ring on his finger.
  • Man wearing a white shirt showcasing the Black Onyx Square Signet Ring on his finger. Close-up highlights the ring's sleek design.
  • Black Onyx Square Signet Ring featuring a silver band with a prominent black square centerpiece, highlighting a strong and elegant onyx design.
  • Black Onyx Square Signet Ring featuring a silver band with a prominent black onyx gemstone, ideal for adding a touch of sophistication to any outfit.

Black Onyx Square Signet Ring

From 
£128
Material
Sterling Silver
Stone
Black Onyx

Heart

A strong touch of onyx goes a long way, especially when paired with the matching signet ring.

We believe fine jewelry should be accessible to everyone.

Our pieces are handcrafted from precious materials like solid gold, sterling silver, and diamonds—never brass or steel—so you can wear them with confidence.

FREE EXPRESS SHIPPING ON ORDERS OVER £100

EXTENDED HOLIDAY RETURNS

2-YEAR WARRANTY

FREE EXPRESS SHIPPING ON ORDERS OVER £100

EXTENDED HOLIDAY RETURNS

2-YEAR WARRANTY

FREE EXPRESS SHIPPING ON ORDERS OVER £100

EXTENDED HOLIDAY RETURNS

2-YEAR WARRANTY

You May Also Like

Square Signet Ring

£648
14k Yellow Gold

Victory Signet Ring

£1,150
14k Yellow Gold

Bold Round Signet Ring

£98
Sterling Silver

Slim Rectangular Signet Ring

£150
Black Titanium

Best Sellers

Bold Huggie Hoops

£178
14k Yellow Gold

Tube Huggie Hoops

£48
Gold Vermeil

Cursive Letter Charm

£98
14k Yellow Gold

Dôme Huggies

£48
Sterling Silver

3 Customer reviews

5.0 of 5 Stars

5 Stars

100%

4 Stars

0%

3 Stars

0%

2 Stars

0%

1 Star

0%

Magnifying glass

Ameera A.

3/6/2024

Information

Verified buyer

Loved it, fits great And

Loved it, fits great And looks classy

Theo S.

1/28/2024

Information

Verified buyer

Love

Perfect ring

Hannah T.

10/11/2023

Information

Verified buyer

love this ring

great mix of classic and cool



WANT ACCESS TO THE BIGGEST SALE EVER?

Become an Mejuri+ member and unlock exclusive early access—starting soon.

LEARN MORE