14K Gold Vermeil — A thick layer of 14K gold bonded over solid 925 sterling silver. Unlike standard gold plating, vermeil is designed to last and gives you the look and feel of fine gold jewellery without the solid gold price. Nickel-free and suitable for sensitive skin.
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- Mira Natural Aquamarine Ring
Mira Natural Aquamarine Ring
Ring size guide
We make full US sizes. The bold letter is the exact UK match; the others fit best in that ring. The mm measurement is the true guide — between two sizes, round up.
| US | UK (best fit) | EU / circ. | Diameter |
|---|---|---|---|
| 3 | E, E½, F, F½ | 44.0 mm | 14.0 mm |
| 4 | G, G½, H, H½ | 47.0 mm | 15.0 mm |
| 5 | I, I½, J, J½ | 49.0 mm | 15.6 mm |
| 6 | K, K½, L, L½ | 51.75 mm | 16.5 mm |
| 7 | M, M½, N, N½ | 54.2 mm | 17.25 mm |
| 8 | O, O½, P, P½ | 57.0 mm | 18.1 mm |
| 9 | Q, Q½, R, R½ | 59.0 mm | 18.8 mm |
| 10 | S, S½, T, T½ | 62.0 mm | 19.7 mm |
Half or quarter US size? A .25 takes the size below (6.25 → 6); a .5 or .75 rounds up (6.5 or 6.75 → 7).
Measure at home
- Wrap paper or string around the base of your finger (not over the knuckle).
- Mark the overlap and measure the length in mm.
- Match it to the EU / circumference column. Or measure the inside of a ring you own and use the Diameter column.
Tip: measure at the end of the day, when fingers are largest. Between sizes? Size up.
Necklace lengths
We offer 45 cm (18 in) and 50 cm (20 in). Here's where each sits.
| Length | Inches | Where it sits |
|---|---|---|
| 40 cm | 16 in | Choker — base of the neck |
| 45 cm | 18 in | Most popular — on the collarbone |
| 50 cm | 20 in | Just below the collarbone — easy to layer |
| 55 cm | 22 in | Upper chest |
How to measure
- Drape a string around your neck where you'd like the necklace to sit.
- Mark the spot and measure against a ruler.
- Layering? Choose lengths about 5 cm (2 in) apart.
Bracelet sizes
Measure your wrist, then add about 1.5–2 cm for a comfortable fit.
| Wrist measurement | Fit |
|---|---|
| 14–15 cm | Petite |
| 15–16.5 cm | Small / Average |
| 16.5–18 cm | Medium |
| 18–19.5 cm | Large |
How to measure your wrist
- Wrap paper or string around your wrist, just below the wrist bone.
- Mark the overlap and measure in cm.
- Add 1.5–2 cm for comfort.
Beaded styles suit most wrists; tennis bracelets are a set length — see the product details.
Still unsure? Message us with your measurement and we'll recommend your size. Every piece has a 365-day guarantee.
✨ 20% off when you buy two or more — applied automatically, no code
The Mira Aquamarine Ring features a genuine natural aquamarine centre stone — a soft, icy-blue emerald cut, mined from the earth and completely one of a kind, framed by two sparkling CZ accents. Set in 14K gold vermeil, this timeless design balances elegance with sophistication — ideal for March birthdays or any special occasion.
Upgraded, August 2026. This design was previously set with an aquamarine-coloured cubic zirconia. It is now set with a genuine natural aquamarine — the same Mira silhouette you know, with a real mined stone at its centre. Because every natural stone is different, no two of these rings are identical.
- Emerald-cut natural aquamarine centre stone (March birthstone) with CZ accents
- Every natural aquamarine is unique — expect gentle variation in tone and clarity from stone to stone
- 14K gold vermeil over 925 sterling silver
- Hypoallergenic, suitable for sensitive skin
- Symbolises calm, clarity, and emotional balance
Material
Gemstone
Aquamarine, the March birthstone, is long associated with calmness, clarity, and harmony. This ring is set with a genuine natural aquamarine — mined from the earth, emerald cut, and completely one of a kind, so expect gentle variation in tone and clarity from stone to stone. Two small CZ accents sit either side of the centre stone.
Measurements
Centre stone: 7x5mm | Total weight: 1.85g
Size Guide
Size Guide
Everything you need to find the perfect fit. Our pieces are 925 sterling silver finished in 14k gold vermeil, rose gold vermeil or rhodium — and we always tell you exactly what you're buying. If you're ever unsure, message us and we'll happily help.
Ring size conversion
Every brand sizes a little differently, so we measured our own rings. We make full US sizes, and the chart below maps each one to UK and EU sizes. The bold letter is the exact UK match; the others in that row are the in-between sizes that fit best in that ring.
| US | UK (best fit) | EU / circumference | Inner diameter |
|---|---|---|---|
| 3 | E, E½, F, F½ (or smaller) | 44.0 mm | 14.0 mm |
| 4 | G, G½, H, H½ | 47.0 mm | 15.0 mm |
| 5 | I, I½, J, J½ | 49.0 mm | 15.6 mm |
| 6 | K, K½, L, L½ | 51.75 mm | 16.5 mm |
| 7 | M, M½, N, N½ | 54.2 mm | 17.25 mm |
| 8 | O, O½, P, P½ | 57.0 mm | 18.1 mm |
| 9 | Q, Q½, R, R½ | 59.0 mm | 18.8 mm |
| 10 | S, S½, T, T½ (or larger) | 62.0 mm | 19.7 mm |
The millimetre measurement is the true guide — US, UK and EU are just labels that approximate it. Between two sizes? Round up.
Measure with string or paper
- Wrap a strip of paper or string snugly around the base of your finger — not over the knuckle.
- Mark where it overlaps.
- Lay it flat against a ruler and measure the length in mm.
- Match that number to the EU / circumference column above.
Measure a ring you own
- Take a ring that already fits the right finger well.
- Measure straight across the inside, in mm.
- Match it to the Inner diameter column above.
Necklace lengths
We currently offer our necklaces in 45 cm (18 in) and 50 cm (20 in). Here's where each length sits, so you can picture it before you choose.
| Length | Inches | Where it sits |
|---|---|---|
| 40 cm | 16 in | Choker — sits at the base of the neck |
| 45 cm | 18 in | Our most popular — rests on the collarbone |
| 50 cm | 20 in | Sits just below the collarbone — easy to layer |
| 55 cm | 22 in | Falls on the upper chest |
Bold lengths are the sizes we offer. 16 in and 22 in are shown for reference.
How to measure
- Take a piece of string and drape it around your neck where you'd like the necklace to sit.
- Mark the spot and measure the length against a ruler.
- Compare to the chart above. Layering two pieces? Choose lengths about 5 cm (2 in) apart so they sit nicely.
Bracelet sizes
The right bracelet fit leaves a little room to move comfortably. Measure your wrist first, then check the guide below.
How to measure your wrist
- Wrap a strip of paper or string around your wrist, just below the wrist bone (where a bracelet naturally sits).
- Mark where it overlaps and measure in cm — that's your wrist size.
- For a comfortable fit, add about 1.5–2 cm to your wrist measurement.
| Wrist measurement | Fit |
|---|---|
| 14–15 cm | Petite |
| 15–16.5 cm | Small / Average |
| 16.5–18 cm | Medium |
| 18–19.5 cm | Large |
Free UK Delivery: Spend over £65 for complimentary standard delivery, or over £95 for free express.
Free Global Shipping: Spend over £95 for free tracked worldwide shipping — including duties covered for all US orders, no surprise fees.
Fast Dispatch: Orders dispatched within 1 working day.
Easy Returns: Return unworn items within 30 days of delivery. Excludes earrings, personalised pieces and custom solid gold items.
We stand behind the quality of every piece. If your jewellery develops a manufacturing fault within 365 days, we'll repair or replace it — no quibbles. Just email us or message us via online chat.
Designed for everyday wear and crafted with care.
Why You’ll Love It
Lab-Grown or Natural Gemstones
Identical composition to mined stones — chosen for beauty and ethics.
14k Gold Vermeil
Thick gold over solid 925 silver — not standard plating.
Gift-Ready Packaging
Arrives beautifully packaged — perfect for meaningful gifting.
True-to-Size Fit
Based on standard US sizing. Between sizes? We recommend sizing up.
Tracked & Secure Delivery
Worldwide shipping with full tracking. USA orders shipped duty paid - no surprise fees.
Made to Last
Secure settings designed for everyday wear.
Loved by customers worldwide
Trusted by 19,000+ customers, with a 4.9/5 rating from over 3,400 reviews.
STUNNING!!
“STUNNING!! Pros: 1. Arrived on time! 2. Much care to pack and ship 3. Well made, looks amazing! Cons: 1. NONE I'm wearing to the symphony next wknd, fave little black dress and these beautiful emeralds! Very happy....”
Even prettier in person
“Beautiful ring and even prettier in person. I’m really happy with it!”
The sparkle is unmatched!
“These earrings are SO pretty and the sparkle is unmatched! I can’t wait to wear them for my wedding!”
STUNNING!!
“STUNNING!! Pros: 1. Arrived on time! 2. Much care to pack and ship 3. Well made, looks amazing! Cons: 1. NONE I'm wearing to the symphony next wknd, fave little black dress and these beautiful emeralds! Very happy....”
Even prettier in person
“Beautiful ring and even prettier in person. I’m really happy with it!”
The sparkle is unmatched!
“These earrings are SO pretty and the sparkle is unmatched! I can’t wait to wear them for my wedding!”
STUNNING!!
“STUNNING!! Pros: 1. Arrived on time! 2. Much care to pack and ship 3. Well made, looks amazing! Cons: 1. NONE I'm wearing to the symphony next wknd, fave little black dress and these beautiful emeralds! Very happy....”
Even prettier in person
“Beautiful ring and even prettier in person. I’m really happy with it!”
The sparkle is unmatched!
“These earrings are SO pretty and the sparkle is unmatched! I can’t wait to wear them for my wedding!”
STUNNING!!
“STUNNING!! Pros: 1. Arrived on time! 2. Much care to pack and ship 3. Well made, looks amazing! Cons: 1. NONE I'm wearing to the symphony next wknd, fave little black dress and these beautiful emeralds! Very happy....”
Even prettier in person
“Beautiful ring and even prettier in person. I’m really happy with it!”
The sparkle is unmatched!
“These earrings are SO pretty and the sparkle is unmatched! I can’t wait to wear them for my wedding!”
STUNNING!!
“STUNNING!! Pros: 1. Arrived on time! 2. Much care to pack and ship 3. Well made, looks amazing! Cons: 1. NONE I'm wearing to the symphony next wknd, fave little black dress and these beautiful emeralds! Very happy....”
Even prettier in person
“Beautiful ring and even prettier in person. I’m really happy with it!”
The sparkle is unmatched!
“These earrings are SO pretty and the sparkle is unmatched! I can’t wait to wear them for my wedding!”
STUNNING!!
“STUNNING!! Pros: 1. Arrived on time! 2. Much care to pack and ship 3. Well made, looks amazing! Cons: 1. NONE I'm wearing to the symphony next wknd, fave little black dress and these beautiful emeralds! Very happy....”
Even prettier in person
“Beautiful ring and even prettier in person. I’m really happy with it!”
The sparkle is unmatched!
“These earrings are SO pretty and the sparkle is unmatched! I can’t wait to wear them for my wedding!”
About Rainbow Rocks
Jewellery has always been personal to me — it marks our moments, memories, and meaning. I created Rainbow Rocks so beautiful gemstone pieces wouldn't be out of reach: genuine lab-grown and natural gemstones, set in 14k gold vermeil over sterling silver, made for everyday wear. Each piece is made to be worn, loved, and to hold a story of its own.
— Yan, Founder
-
4.9 Rating from 3,500+ Reviews
Loved by 20,000+ customers worldwide
-
Lab-Grown & Natural Gemstones
Same composition as mined stones — ethically crafted.
-
14k Gold Vermeil & Sterling Silver
Thick gold over solid 925 silver — made for everyday wear
-
365-day guarantee
Every piece covered for a full year — shop with confidence.
Get 15% off your first order
Be the first to know about new collections and exclusive offers.
- 5 stars: 22 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
this ring is absolutely gorgeous. my girlfriend got it for me as a promise ring and its stunning. you can tell the quality is super good and the gems are beyond shinny. im pretty sure this is the shinyiest ring I've ever owned. I had a panic moment when I thought I ordered the wrong size but the owner was great at communicating and told me to wait and see how it fits and it ended up fitting perfectly and true to size. all around an amazing experience!
I have both of the aquamarine rings which I think are beautiful. It is my birthday stone and I have been promising myself that I would buy one but I could not choose so bought two.
Beautiful! It was just as expected.
It was prettier than a thought
Everything okey! :)
Beautiful ring, bought it for myself after a difficult year. Love it!♥️
I am so happy with the ring. It’s actually my engagement ring and I’ve never been happier! It’s so beautiful! The quality is more than I’ve seen for £500+ rings and yet this ring is incredibly affordable! Great advice from seller and I’m so happy!
the ring is beautiful but its a bit too mall, going to try and exchange it for a size larger. seller gave great help for the exchange process, highly recommend this shop!!
Beautiful ring! Shipped quickly and as expected.
This ring is amazing and Yan Iris was the best in terms of communications. Very happy!
This is my second ring bought from this seller. Gorgeous ring and arrived on time. Very happy with my purchase
Beautiful ring and fast delivery turnover
Absolutely beautiful and well packaged I will be buying again
Beautiful ring! Even prettier in person! I ordered this ring two weeks after others from other Etsy stores and it still came first! Shipping is fast and well packaged!
Very nice quality and craftsmanship. The attention to detail was outstanding.
Absolutely perfect. Fit like a glove, looks so sparkly delicate and expensive! Beautifully wrapped, and in my hands less than 48hours from the point of ordering! Highlight recommend, and will definitely buy other pieces in the future 🤍
Leuk kado voor mijn vriendin. Ze is er erg blij mee
Lovely item and very pretty
Would buy from this business again in the future