Black Onyx Dome Ring — Gold Tone Statement

A single black onyx, polished flat and set into a domed cap of gold tone — a ring that does all the talking on its own.

Why You'll Love It

• The stone is smooth, not sparkly – a 12 mm black onyx cabochon with no facets at all. It reads as one deep, solid black rather than a scatter of light, which is what makes it look expensive.
• A dome that catches light on the way past – the 20 mm setting curves up and over the stone, so the gold tone runs from bright to dark across the curve.
• Six sizes, one ring for everyone – a 20 mm face is a statement, but the band stays slim at 2.5 mm and comes in US 7 to US 12 — the women's range and the men's range on the same design.
• Wears light for its size – about 5 g at size 7, and the balance sits low on the finger instead of tipping forward.
• Pairs with the matching pendant – the same black onyx disc is available as a pendant. See the Black Onyx Round Pendant

Product Details

• Stone: Black onyx — 12 mm round cabochon, 1 mm thick
• Face: 20 mm diameter
• Band width: 2.5 mm
• Material: Copper-zinc alloy base with 18K gold-tone finish
• Finish: High-polish 18K gold tone
• Weight: Approx. 5 g at size 7
• Available sizes: US 7 / 8 / 9 / 10 / 11 / 12
• Hypoallergenic: Yes

Perfect For

Everyday wear, the office, evenings and gifting. It is the ring that finishes a plain outfit, and it works just as well on an index finger as it does on a ring finger.

Care Instructions

Wipe clean with a soft dry cloth after each wear. Keep the stone away from perfume, hairspray and harsh chemicals, and store it separately from harder pieces so the polish is not scratched.

Frequently asked

Which size should I order?
It comes in US 7 to US 12. As a guide, US 7–9 is the usual women's range and US 10–12 the usual men's. Measure a ring that already fits you and compare it to a US size chart — or read How to Find Your Ring Size at Home.

Is the onyx real?
Yes. It is black onyx, cut as a smooth cabochon rather than faceted — which is why it reads as a solid, deep black instead of catching light.

Will it catch on things?
No. The stone sits flush inside the dome with a smooth rim around it, so there are no claws or edges to snag knitwear or hair.

Will the finish fade?
The 18K gold tone is applied as a vacuum ion finish over a copper-zinc alloy base. With normal wear and the care routine above, it keeps its color far longer than ordinary fashion jewelry.

When will it arrive?
Orders are dispatched within 3 business days. Standard delivery takes 7–12 business days after dispatch, so most orders arrive within 10–15 business days. Flat US$5.90 worldwide, free on orders over $30 after discount.

Read the full jewelry care guide