Watch how your eternity band is made.
An eternity band is a single unbroken circle of stones — and every one is set by hand, all the way around, in our family workshop. These are the stages yours passes through before it reaches you.
Grinding the Band
Cast in solid gold, the band is first ground down by hand to its true shape and width — and the seat for the stones is prepared, all the way around the circle.
Setting the Eternity of Stones
This is the heart of it. Every emerald is set into the band by hand, one after another, all the way around — each stone aligned to the last so the row reads as one continuous, unbroken line of green. On a full eternity, that's hours of patient, exacting work.
Hand Polished
With the full circle set, the band is hand-polished through progressively finer abrasives until the gold is mirror-bright and every emerald sits clean and clear.
The Finished Band
The result: an endless loop of Colombian green, even and bright from every angle. Jack checks each stone and the full circle personally before it leaves the workshop.
Between two sizes? Always size up.
Because the stones run the full way around, an eternity band is made to your exact size — it can't be quietly stretched or cut down later the way a plain band can. So if you're between sizes, we'd always rather it sit a hair loose: comfortable, and easy over the knuckle.
Made to Your Size
Each band is crafted to the exact size you choose — nothing generic, nothing pre-stocked.
Not Sure? Just Ask
Send us your measurement and Jack will confirm the right size with you before we begin.
Cared For, For Life
Cleaning, re-polishing, and stone checks are free for as long as you wear it.
Specifications & certification.
Specifications
Key features
Certified & documented.
Lab-Grown Emerald Quality
We source only high-grade lab-grown emeralds — chosen for their deep saturation and vivid colour. Like all emeralds, each stone carries fine natural inclusions; we select ours at just the right level — present enough to read as a true emerald, never so much as to cloud the colour or dull the brilliance. The result is a clean, lively green across the whole band.
Your Certificate
Your eternity band arrives with a GRC certificate documenting the finished piece — its metal, the emerald specifications, and total carat weight — for your records and insurance. Each band is registered with a unique identification code for secure reference.
About GRC
The Gemological Research Council is an independent lab specialising in coloured-gemstone certification. Their reports give a detailed, transparent analysis of each stone's quality.
Ring Size Guide
US & Canada Ring Sizes
| US Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 3 | 14.1 | 44.2 |
| 3.5 | 14.5 | 45.5 |
| 4 | 14.9 | 46.8 |
| 4.5 | 15.3 | 48.0 |
| 5 | 15.7 | 49.3 |
| 5.5 | 16.1 | 50.6 |
| 6 | 16.5 | 51.9 |
| 6.5 | 16.9 | 53.1 |
| 7 | 17.3 | 54.4 |
| 7.5 | 17.7 | 55.7 |
| 8 | 18.2 | 57.0 |
| 8.5 | 18.6 | 58.3 |
| 9 | 19.0 | 59.5 |
| 9.5 | 19.4 | 60.8 |
| 10 | 19.8 | 62.1 |
| 10.5 | 20.2 | 63.4 |
| 11 | 20.6 | 64.6 |
| 11.5 | 21.0 | 65.9 |
| 12 | 21.4 | 67.2 |
UK & Australia Ring Sizes
| UK Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| F | 14.1 | 44.2 |
| G | 14.5 | 45.5 |
| H | 14.9 | 46.8 |
| I | 15.3 | 48.0 |
| J | 15.7 | 49.3 |
| K | 16.1 | 50.6 |
| L | 16.5 | 51.9 |
| M | 16.9 | 53.1 |
| N | 17.3 | 54.4 |
| O | 17.7 | 55.7 |
| P | 18.2 | 57.0 |
| Q | 18.6 | 58.3 |
| R | 19.0 | 59.5 |
| S | 19.4 | 60.8 |
| T | 19.8 | 62.1 |
| U | 20.2 | 63.4 |
| V | 20.6 | 64.6 |
| W | 21.0 | 65.9 |
| X | 21.4 | 67.2 |
European Ring Sizes
| EU Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 44 | 14.1 | 44.2 |
| 45 | 14.5 | 45.5 |
| 46 | 14.9 | 46.8 |
| 48 | 15.3 | 48.0 |
| 49 | 15.7 | 49.3 |
| 50 | 16.1 | 50.6 |
| 52 | 16.5 | 51.9 |
| 53 | 16.9 | 53.1 |
| 54 | 17.3 | 54.4 |
| 56 | 17.7 | 55.7 |
| 57 | 18.2 | 57.0 |
| 58 | 18.6 | 58.3 |
| 60 | 19.0 | 59.5 |
| 61 | 19.4 | 60.8 |
| 62 | 19.8 | 62.1 |
| 63 | 20.2 | 63.4 |
| 65 | 20.6 | 64.6 |
| 66 | 21.0 | 65.9 |
| 67 | 21.4 | 67.2 |
Japanese Ring Sizes
| JP Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 4 | 14.5 | 45.5 |
| 5 | 14.9 | 46.8 |
| 6 | 15.3 | 48.0 |
| 7 | 15.7 | 49.3 |
| 8 | 16.1 | 50.6 |
| 9 | 16.5 | 51.9 |
| 10 | 16.9 | 53.1 |
| 11 | 17.3 | 54.4 |
| 12 | 17.7 | 55.7 |
| 13 | 18.2 | 57.0 |
| 14 | 18.6 | 58.3 |
| 15 | 19.0 | 59.5 |
| 16 | 19.4 | 60.8 |
| 17 | 19.8 | 62.1 |
| 18 | 20.2 | 63.4 |
| 19 | 20.6 | 64.6 |
| 20 | 21.0 | 65.9 |
| 21 | 21.4 | 67.2 |
Find Your Ring Size
Measure Your Finger
- Use a flexible measuring tape or length of string.
- Wrap it around the finger you'll wear your ring on. If you're creating a ring stack, consider where on your finger the ring will sit. If using string, mark the point on the string where the ends meet with a pen.
- Lay the string on a flat surface and use a ruler to measure the length (in inches or millimeters) up to the mark. Compare your measurement to the size chart to determine your ring size. If you are between sizes, opt for the larger size.
Measure an Existing Ring
- Choose a ring that already fits your finger well.
- Measure the interior diameter of the ring in millimeters (mm).
- Use the measurement chart to match the size of your ring to the closest size in mm. The interior of the ring should align with the outer edge of the circle.
Luther's At Your Service
There's no question too small or request too large for Luther's Diamonds client advisors. From choosing an engagement ring or gift to providing in-store or virtual appointments, we're always at your service.
