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. 925 Sterling Silver with Rhodium Finish — Solid 925 sterling silver finished with a protective layer of rhodium, a precious metal from the platinum family. The rhodium gives a bright, luminous white shine and helps guard against tarnishing. Nickel-free and suitable for sensitive skin.
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- Clara Natural Moss Agate Necklace
Clara Natural Moss Agate Necklace
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 Clara Natural Moss Agate Necklace combines earthy beauty and sophistication — a moss agate centre stone surrounded by luminous lab opal accents and sparkling cubic zirconia, all set in high-quality 14K gold vermeil. Perfect for layering or wearing solo, this piece brings a touch of natural charm to any look.
- Moss agate centre with lab opal and CZ accents
- Sterling silver with rhodium finish or 14K gold vermeil over sterling silver
- Hypoallergenic, suitable for sensitive skin
- Traditionally known as the gardener's stone, linked with nature and the changing seasons
Material
Gemstone
Moss agate is famous for its moss-like inclusions: natural green patterns that look like tiny landscapes, so no two stones are ever the same. Traditionally known as the gardener's stone, it has long been linked with nature, gardens and the changing seasons.
Measurements
Centre stone: 6x8mm agate | Pendant size: 17.5x9.5mm | Surround stones: opal, moss agate (marquise cut)
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: 58 (98%)
- 4 stars: 1 (2%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
I purchased a necklace and earrings for my wife as an anniversary gift and she absolutely LOVES it! Great quality and they look even better in person
I was originally going to buy this as a gift but ended up keeping it because it’s just that pretty! Shipping from the UK is seriously quicker than I expected!
This necklace is stunning, far more beautiful than I had even imagined. It’s wonderful quality and such a unique look, I love it so much! The owner of the shop is also incredibly helpful and had great communication.
Shipping really quick we are in Quebec (canada and it took less then 2 weeks). The quality is super good, couldnt be more happy to buy this for my girl.
My girlfriend loves it and the seller helped me out when I had a specific deadline for when I needed it. Thank you so much!!!!
It is beautiful I love it
Beautiful necklace just perfect for a birthday present
Very very very very good
Great quality. Short review and simple.
It is very nice, yeah.
Bought the necklace and earrings combo for my girlfriend. She loves moss agate and these are such wonderful quality and so gorgeous. She absolutely loves them and I will definitely look here for more jewelry in the future.
I love it!! Exactly as pictured, super high quality. I havent taken it off in quite some time and it's holding strong.
very good, love it! yippie
Nice necklace and easy to work with seller
Great quality all as expected
Bought this Necklace for my partner for Christmas, and it didn't fail to impress! Super gorgeous stone with lovely fine detail. Would recommend!
My mom loved it, exactly as described and fast shipping.
Beautiful, my daughters favourite present .
While the necklace is small and the chain does appear to be thin and delicate it is exactly the kind of beautiful but simple piece that I wanted.
Such a gorgeous necklace! Thank you so much!
Absolutely beautiful I love it’s originality
The item arrived on time and my girlfriend loved it
Edited my review after Yan so helpfully explained shipping/tariffs being paid for already and quality of vermeil setting/chain. My daughter chose for Xmas gift so she should love it.
The necklace I ordered is beautiful very well packaged and looks just as pictured. Very pleased.
Looks just as advertised :)
This seems high quality and matched the pictures and description. Thanks!
My just friend loves it
Item was perfect and even better than expected! Couldn't be happier.
Beautiful pendant with exquisite attention to detail. Highly recommended