Step 1
Design & Selection
We finalise your design and hand-pick the certified center stone.
Save 20%An emerald cut lab grown diamond in four claws on a smoothly domed band with a comfort fit interior. There are no accent stones anywhere on the ring.
A comfort fit band is rounded on the inside as well as the outside, so it sits on a curved surface rather than on two square edges. It slides over the knuckle more easily, it does not pinch when your fingers swell, and once it is on you stop noticing it. For a ring you intend to wear every day for decades, that construction matters more than any decoration.
Outside, the shank is domed and mirror polished, of even width all the way round. The claws rise directly out of the band with no raised gallery, so the whole ring is one continuous curve from the finger up to the stone.
That plainness is the point. With a large step cut diamond and nothing else on the ring, every line has to be true, which is why we polish these by hand and check the shank for evenness before the stone goes in.
A medium weight shank that feels substantial without being wide. Because the inside is curved rather than flat, the ring wears a fraction looser than a standard fit at the same measurement, which most people find more comfortable.
Choose 925 sterling silver, or 10K, 14K or 18K gold in yellow, rose or white. Every metal is fully hallmarked. White gold is finished with rhodium for a bright cool white. On a completely plain ring the metal colour is the only decision to make, so choose what you want to see every day.
Every ring is made to order in your size. Select your size at checkout. Comfort fit bands run slightly loose, so if you are between sizes we usually recommend the smaller. Contact us if you would like advice.
We can change the center carat weight, the color and clarity grade, make the band wider or narrower, or add a hidden halo under the stone. Write to us at https://mapplegems.com/pages/contact and we will quote your version.
Is the center stone a real diamond
Yes. A lab grown diamond is real diamond. It has the same carbon crystal structure, the same hardness of 10 on the Mohs scale and the same optical behaviour as a mined diamond. The only difference is where it was grown.
Does the ring come with a certificate
Yes. An IGI certificate for the center stone is included at no extra charge.
What does comfort fit mean
The inside of the band is domed rather than flat, so less metal touches your finger and the ring passes over the knuckle more easily. It is the most comfortable construction for daily wear.
Should I size differently for comfort fit
Comfort fit usually feels a little looser than a flat interior at the same size, so if you are between sizes take the smaller one. Tell us and we will advise.
Can this ring be resized later
Yes, easily, in either direction. The band carries no stones. Your first resizing with us is free.
How is this different from your other plain solitaires
Our tapered round band solitaire narrows toward the head and uses a squared basket. Our cathedral solitaire arches up on cut out shoulders. This one is a single even domed band with a comfort fit interior, made for wearing rather than for looking complicated.
Does a wedding band sit flush against it
Yes. The band is straight and the setting sits low, so a plain or eternity band sits neatly beside it.
Is it comfortable for daily wear
It is the most comfortable design we make. No pave to catch, no sharp edges, and a rounded interior.
Which metal should I choose
Yellow gold for warmth, white gold or sterling silver to make the diamond look as large as possible, rose gold for a softer tone.
A lab grown diamond gives you the same material as a mined stone with a documented origin. On a plain solitaire the diamond is the only thing to look at, so putting the entire budget into carat weight and clarity is exactly right, and lab grown is what makes a large clean emerald cut affordable.
Mapple Gems is a jewellery workshop in Surat, India, the city where a large share of the world's diamonds are cut and polished. We grow, cut, grade and set in one place, which is why we can offer certified stones in fully hallmarked gold at workshop prices.
Compare ring sizes across international standards — match your size from any region.
| USA · Canada | UK · Australia Ireland · NZ |
Japan · India China · S. Africa |
Spain · Italy Neth. · Switz. |
Inside Ø & Circumf. (mm) |
|---|---|---|---|---|
| 4 | H | 7 | 6.75 | 14.88 & 46.80 |
| 4.25 | H.5 | 7.5 | 15.09 & 47.40 | |
| 4.5 | I | 8 | 8 | 15.29 & 48.00 |
| 4.75 | J | 8.75 | 15.49 & 48.70 | |
| 5 | J 1/2 | 9 | 9.25 | 15.70 & 49.30 |
| 5.25 | K | 10 | 15.90 & 50.00 | |
| 5.5 | K 1/2 | 10 | 10.5 | 16.10 & 50.60 |
| 5.75 | L | 11.25 | 16.31 & 51.20 | |
| 6 | L 1/2 | 11 | 11.75 | 16.51 & 51.90 |
| 6.25 | M | 12 | 12.5 | 16.71 & 52.50 |
| 6.5 | M 1/2 | 13 | 13.25 | 16.92 & 53.10 |
| 6.75 | N | 13.75 | 17.12 & 53.80 | |
| 7 | N 1/2 | 14 | 14.5 | 17.32 & 54.40 |
| 7.25 | O | 15 | 17.53 & 55.10 | |
| 7.5 | O 1/2 | 15 | 15.75 | 17.73 & 55.70 |
| 7.75 | P | 16.25 | 17.93 & 56.30 | |
| 8 | P 1/2 | 16 | 17 | 18.14 & 57.00 |
| 8.25 | Q | 17.5 | 18.34 & 57.60 | |
| 8.5 | Q 1/2 | 17 | 18.25 | 18.54 & 58.30 |
| 8.75 | R | 19 | 18.75 & 58.90 | |
| 9 | R 1/2 | 18 | 19.5 | 18.95 & 59.50 |
| 9.25 | S | 20.25 | 19.15 & 60.20 | |
| 9.5 | S 1/2 | 19 | 20.75 | 19.35 & 60.80 |
| 9.75 | T | 21.5 | 19.56 & 61.40 | |
| 10 | T 1/2 | 20 | 22 | 19.76 & 62.10 |
| 10.25 | U | 21 | 22.75 | 19.96 & 62.70 |
| 10.5 | U 1/2 | 22 | 23.25 | 20.17 & 63.40 |
| 10.75 | V | 24 | 20.37 & 64.00 | |
| 11 | V 1/2 | 23 | 24.75 | 20.57 & 64.60 |
| 11.25 | W | 25.25 | 20.78 & 65.30 | |
| 11.5 | W 1/2 | 24 | 26 | 20.98 & 65.90 |
| 11.75 | X | 26.5 | 21.18 & 66.60 | |
| 12 | X 1/2 | 25 | 27.25 | 21.39 & 67.20 |
| 12.25 | Y | 27.75 | 21.59 & 67.80 | |
| 12.5 | Z | 26 | 28.5 | 21.79 & 68.50 |
| 12.75 | Z 1/2 | 29 | 22.00 & 69.10 | |
| 13 | 27 | 29.75 | 22.20 & 69.70 | |
| 13.25 | Z1 | 30.5 | 22.40 & 70.40 | |
| 13.5 | 31 | 22.61 & 71.00 | ||
| 13.75 | Z2 | 31.75 | 22.81 & 71.70 | |
| 14 | Z3 | 32.25 | 23.01 & 72.30 | |
| 14.25 | 33 | 23.22 & 72.90 | ||
| 14.5 | Z4 | 33.5 | 23.42 & 73.60 | |
| 14.75 | 34.25 | 23.62 & 74.20 | ||
| 15 | 34.75 | 24.23 & 76.10 |










Every piece is made to order — from first sketch to the final polish.
Step 1
We finalise your design and hand-pick the certified center stone.
Step 2
Master jewelers cast and shape the band to exact specifications.
Step 3
Each stone is hand-set and the piece is polished to a mirror finish.
Step 4
Final inspection, certification, and luxury gift packaging.
Real diamonds grown in a lab — chemically and optically identical to mined diamonds, graded on the same 4Cs, at a lower price and conflict-free.
All metal is solid (10K/14K/18K gold or platinum), never plated.
Yes — share your idea and we'll craft it with a CAD preview before production.
Yes, IGI/GIA certificates ship with every lab-grown diamond.
Made-to-order pieces ship in about 7–8 business days with insured tracking. Free worldwide.
Yes, we ship worldwide. Import duties may apply by country.
All major cards, PayPal, and installments via Shop Pay / Klarna / Afterpay.
30-day return or exchange on eligible items. Custom/engraved pieces are non-returnable except for defects. Refunds issued ~2 days after inspection.
Yes — one complimentary resize after delivery; contact us with your new size.
The Mapple Gems Promise
Free Shipping Worldwide
24/7 Customer Service
100% Money Back Guarantee
Unbeatable Market Price