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Black Onyx
Natural Black Onyx Ring
Jewelry with Soul. Power with Purpose.
£54.00
Unit price perMeasure My Own Ring
Instructions
- Use a ring that fits the desired finger.
- Measure the internal diameter of the ring (in mm). Ensure your ruler starts at the 0mm mark.
International Ring Size Chart
|
Inside Diameter Millimeters (mm) |
Inside Circumference Millimeters (mm) | U.S. and Canada | U.K., Europe and Australia | Asia (Hong Kong, China, Singapore, Japan) |
| 14.1 | 44.3 | 3 | F | 4 |
| 14.3 | 44.9 | 3.25 | F.5 | 5 |
| 14.5 | 45.6 | 3.5 | G | |
| 14.7 | 46.2 | 3.75 | G.5 | 6 |
| 14.9 | 46.8 | 4 | H | 7 |
| 15.1 | 47.4 | 4.25 | H.5 | |
| 15.3 | 48.1 | 4.5 | I | 8 |
| 15.5 | 48.7 | 4.75 | I.5 | |
| 15.7 | 49.3 | 5 | J | 9 |
| 15.9 | 50.0 | 5.25 | J.5 | |
| 16.1 | 50.6 | 5.5 | K | 10 |
| 16.3 | 51.2 | 5.75 | K.5 | |
| 16.5 | 51.8 | 6 | L | 11 |
| 16.7 | 52.5 | 6.25 | L.5 | 12 |
| 16.9 | 53.1 | 6.5 | M | 13 |
| 17.1 | 53.7 | 6.75 | M.5 | |
| 17.3 | 54.3 | 7 | N | 14 |
| 17.5 | 55.0 | 7.25 | N.5 | |
| 17.7 | 55.6 | 7.5 | O | 15 |
| 17.9 | 56.2 | 7.75 | O.5 | |
| 18.1 | 56.9 | 8 | P | 16 |
| 18.3 | 57.5 | 8.25 | P.5 | |
| 18.5 | 58.1 | 8.5 | Q | 17 |
| 18.8 | 59.1 | 8.75 | Q.5 | |
| 19 | 59.7 | 9 | R | 18 |
| 19.2 | 60.3 | 9.25 | R.5 | |
| 19.4 | 60.9 | 9.5 | S | 19 |
| 19.6 | 61.6 | 9.75 | S.5 | |
| 19.8 | 62.2 | 10 | T | 20 |
| 20 | 62.8 | 10.25 | T.5 | 21 |
| 20.2 | 63.5 | 10.5 | U | 22 |
| 20.4 | 64.1 | 10.75 | U.5 | |
| 20.6 | 64.7 | 11 | V | 23 |
| 20.8 | 65.3 | 11.25 | V.5 | |
| 21 | 66.0 | 11.5 | W | 24 |
| 21.2 | 66.6 | 11.75 | W.5 | |
| 21.4 | 67.2 | 12 | X | 25 |
| 21.6 | 67.9 | 12.25 | X.5 | |
| 21..8 | 68.5 | 12.5 | Y | 26 |
| 22 | 69.1 | 12.75 | Z | |
| 22.2 | 69.7 | 13 | Z.5 | 27 |
| 22.4 | 70.4 | 13.25 | ||
| 22.6 | 71.0 | 13.5 | Z1 |
Measure My Finger
Instructions
- Cut a thin strip of paper, ensure it’s not too wide.
- Wrap a strip of paper around your finger where you’d like your ring to be. Make sure that the paper is pulled snug to your finger (the tighter the better) to fine your best fit.
- Mark the spot where the paper meets and measure the distance with a ruler (mm).
Use the size chart to determine your ring size.
| Circumference (mm) | US/CAN |
| 44.3mm | 3 |
| 46.8mm | 4 |
| 49.3mm | 5 |
| 51.8mm | 6 |
| 54.3mm | 7 |
| 56.9mm | 8 |
| 59.7mm | 9 |
| 62.2mm | 10 |
| 64.7mm | 11 |
| 67.2mm | 12 |
| 69.7mm | 13 |
Tips On How To Measure
- Measure your ring size at the end of the day when fingers are at their largest.
- Consider the width of the band, a particularly thick band will feel tighter than a thin band so you may want to buy a full size larger that your normal ring size.
- Do not measure your hands when they are cold, they may have shrunk up to half a size.
- Alcohol and salt can make your fingers swell so refrain from measuring your ring size after cocktails and appetizers.
Confidence, built in
30-day easy returns
2-year craftsmanship warranty
Fully tracked delivery
Secure encrypted checkout
This Natural Black Onyx Ring is all about strength and confidence. Black Onyx is known for protecting you from negativity and helping you stay strong. Paired with sparkling White Zircon, this ring adds a touch of balance and style. It’s a simple yet powerful piece that you can wear every day as a reminder of your inner strength.
MAIN STONE
Gemstone: Natural Black Onyx
Stone Size: 7 × 9 mm
Stone Shape: Cushion Cut
SIDE STONE
Gemstone: White Zircon * 2
Stone Size: 1.5 × 1.5 mm
Stone Shape: Round
BASIC INFORMATION
Silver Weight: 1.85 g
Width: 8.0 mm
Height: 7.9 mm
Thickness: 10.0 mm
Material: S925 Sterling Silver with 10K Gold Plating
Every Minerva Jewelry piece is crafted with care, precision, and purpose. Each material represents a different level of quality, durability, and brilliance — so you can choose what fits your lifestyle best.
Solid Gold (10K–18K)
Crafted entirely from real 10K–18K gold in yellow, rose, or white tones. Naturally precious and designed for long-lasting beauty and true fine jewelry standards.
Your heirloom, your legacy.
Gold Vermeil (18K Vermeil)
A thick layer of genuine 18K gold (≥2.5μm) over a sterling silver base. More durable and luxurious than standard gold-plated jewelry, offering rich gold tones that stand the test of time.
Ideal for meaningful pieces made to last.
Gold-Plated Sterling Silver
A fine layer of 18K gold plated on a 925 sterling silver core. Brings a warm shine and refined look with everyday affordability.
Elegant strength for daily confidence.
925 Sterling Silver
Bright, hypoallergenic, and durable. Finished with a clean mirror polish for timeless simplicity and effortless style.
Minimal, powerful, endlessly wearable.
All pieces are nickel-free, hypoallergenic, and made to accompany your daily rituals with beauty and intention.
We select every material with purpose — balancing brilliance, longevity, and the empowering energy behind each design.
→ Learn more about our materials and craftsmanship
🇬🇧 UK DELIVERY
- Standard Delivery: £3.95
- Free Shipping on orders over £60
- Estimated delivery: 3–5 working days
- Customised items: Please allow up to 10 extra working days
🇺🇸 US DELIVERY
- Standard Delivery: $10.00
- Free Shipping on orders over $75
- Estimated delivery: 5–9 working days
- Customised items: Please allow up to 10 extra working days
🌍 INTERNATIONAL DELIVERY
- Standard Delivery: $12.00
- Free Shipping on orders over $100
- Estimated delivery: 5–14 working days
- Customised items: Please allow up to 10 extra working days
- Duties and taxes included
♻️RETURNS
Refunds and exchanges are available within 30 days if items meet return eligibility.
For full details, visit our DELIVERY & RETURNS INFORMATION page.
• Signature jewellery case
• Protective outer packaging
• Ready for gifting
Arrives beautifully packaged, ready to gift.
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Every Minerva piece is infused with meaning - from energy to intention.
ETHICS & SUSTAINABILITY
At Minerva Jewelry, we believe beauty begins with integrity. Guided by respect for the planet and its people, we embrace conscious craftsmanship — using conflict-free diamonds, lab-grown stones, and recycled metals. Every design reflects our values: thoughtful, responsible, and made to empower. Each piece is crafted with intention — from lab-grown gemstones to recycled metals — honouring the Earth and empowering your journey.