Black Onyx Ring | Modern Minimalist | Sterling Silver
Black Onyx Ring | Modern Minimalist | Sterling Silver
Boutique jeweler price: $200+
Find your ring size
Most of our rings are adjustable from US 5 to 12. Use this guide to confirm your size fits the range — or to pick the right fixed size when offered.
Measure a ring you already own
Take a ring that fits the same finger. Measure the inside diameter (across the centre, edge to edge) with a ruler in millimetres. Match it to the chart.
Use a strip of paper or string
- Cut a thin strip of paper (about 1 cm wide) or take a piece of string.
- Wrap it around the base of your finger snugly — not tight.
- Mark where the ends meet, then measure the length in millimetres.
- That number is your inside circumference. Match it on the chart.
Match your inside diameter or circumference (in mm) to the row that's closest.
| US | UK | EU | Ø mm | Circ. mm |
|---|---|---|---|---|
| 4 | H | 47 | 14.9 | 46.8 |
| 4.5 | I | 48 | 15.3 | 48.0 |
| 5 | J½ | 49 | 15.7 | 49.3 |
| 5.5 | L | 51 | 16.1 | 50.6 |
| 6 | L½ | 52 | 16.5 | 51.9 |
| 6.5 | N | 53 | 16.9 | 53.1 |
| 7 | N½ | 54 | 17.3 | 54.4 |
| 7.5 | O½ | 55 | 17.7 | 55.7 |
| 8 | P½ | 57 | 18.1 | 57.0 |
| 8.5 | Q½ | 58 | 18.5 | 58.3 |
| 9 | R½ | 59 | 19.0 | 59.5 |
| 9.5 | S½ | 60 | 19.4 | 60.8 |
| 10 | T½ | 62 | 19.8 | 62.1 |
| 10.5 | U½ | 63 | 20.2 | 63.4 |
| 11 | V½ | 64 | 20.6 | 64.6 |
| 11.5 | W½ | 65 | 21.0 | 65.9 |
| 12 | X½ | 67 | 21.4 | 67.2 |
Highlighted rows mark the adjustable range (US 5–12) for most of our rings.
- Measure at the end of the day. Fingers are smallest in the morning and swell slightly by evening — measuring then gives the most comfortable fit.
- Keep hands warm. Cold fingers can be up to half a size smaller.
- Wider bands fit tighter. If a ring is 6 mm wide or more, consider going up by half a size.
- Knuckle larger than the base? Size for the knuckle so the ring slides on, and pair with a ring sizer if it spins.
- Between two sizes? Choose the larger one — it's easier to resize down than up.
Still unsure? Email info@oliviastarjewelry.com with your circumference in mm and we'll recommend a size.
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Quiet, grounded, one-of-a-kind. This onyx is hand-set in polished 925 sterling silver — small variations in colour and veining are part of what makes it real.
Details
- Solid 925 sterling silver, hand-polished
- Hand-set onyx — natural variation in tone and pattern is expected
- Available in US sizes 5–12 (select at checkout)
- Hypoallergenic, nickel-free
- Backed by a 1-year warranty against manufacturing defects
Why it's special
Natural stones carry character that lab-grown can't replicate. Slight variation in tone or pattern is the point — you're getting something formed over millions of years, not stamped out of a mold.
Care
Hand-polished and tarnish-resistant. Avoid contact with perfume, lotion, and chlorinated water. Wipe with a soft cloth after wear and store in the jewelry box it ships in.
Black Onyx Ring | Modern Minimalist...
$45
Made by hand in our workshop
Collapsible content
Shipping & Returns
Free standard shipping on all US orders. Orders ship Mon–Wed and arrive in 3-5 business days. International shipping available at checkout.
30-day returns on unworn items.
Materials & Care
Solid 925 sterling silver. Hypoallergenic and tarnish-resistant.
Avoid contact with perfume and chlorine. Store dry, polish with soft cloth.
GRA Certificate & Authenticity
Every moissanite stone is GRA-certified — independent lab verification of cut, clarity, and color. Certificate ships with your jewelry box.
Warranty
Each piece is covered by a 1-year warranty against manufacturing defects. Reach out to contact with photos and we’ll take care of it.