Your diamond, cut for you.
The diamond is the soul of the ring, and most people just take whatever the case has in stock. We don't work that way. A rare shape, an unusual color, a specialty cut, or a stone cut from scratch. We help you find or create the one that's actually yours.
The stones on our ring orders.
A custom diamond is a stone found or cut for one ring: a rare shape, an unusual colour, a specialty cut like a Portuguese cut or our crisscut Dutch marquise, or a diamond cut from rough to your spec and graded by IGI.
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3.0 ct
is the median centre stone on our ring orders. The middle half fall between 2.5 and 3.5 carats.
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86%
of ring orders specify D, E or F colour, the colourless top of the scale. Our default on a quote is F colour.
-
5%
are a fancy colour diamond on purpose, like champagne or pink.
| Colour grade | What it means | Share of ring orders |
|---|---|---|
| D to F | Colourless | 86% |
| G to J | Near colourless, a faint warmth next to a white stone | About 5% |
| Fancy colour | Colour on purpose: champagne, pink, yellow | About 5% |
From our own order tracker: about 640 ring orders paid for between December 2025 and October 2026, every stone, not only custom ones. Shares use the orders where colour was filled in. Colour grades follow the GIA D to Z colour scale. Prices for each size: what a custom ring costs.
The cuts we've gotten obsessed with.
Shape is the outline. Cut is what happens inside it. How the stone is faceted, how it throws light, how alive it feels on your hand. These three are the ones we've put real work into getting right. A lot of what we love falls under what jewelers call antique cuts. Old-world faceting like the Portuguese cut, step cuts, and shapes you'd find on a ring from a hundred years ago, brought back with modern precision.
The bowtie-free oval
Almost every oval diamond has a dark shadow stretched across the middle. It's called a bowtie, sometimes written bow tie or bow-tie effect, and most people just learn to live with it. We source and cut our ovals to kill it, so the stone stays bright from end to end. Side by side, you can't unsee the difference.
The Portuguese cut
Extra rows of facets, which means a lot more fire. We cut it on more than one shape. The marquise turns dramatic and vintage, the oval stays a little more classic. Plenty of cutters offer a Portuguese cut, so I won't pretend it's ours alone. We just love it.
The crisscut Dutch marquise
This one we built. A Dutch marquise with a crisscut facet pattern. Sharp points, long clean lines, and a sparkle a standard marquise just can't do. If you want something almost nobody has seen, here it is.
Every cut, on every shape we can.
Most of these cuts work across more than one shape. Pick a cut to see what we can do with it.
Shapes you won't find in a case.
Round is beautiful, but it's also everywhere. The silhouette of your stone is the first thing anyone notices, and the fastest way to make a ring feel unmistakably yours. These are the shapes most jewelers never bother to stock. Pick one to explore.
A diamond doesn't have to be colorless.
Here's what most people get backwards. The deep, saturated colors, the bold yellows and blues, are actually the easy ones to find. It's the soft, pale tones that are hard. A whisper of pink. A pale champagne. A barely-there green. Lighter color means everything has to line up just right, and stones like that don't come around often. When one does, we grab it.
Cutting the stone for you is as unique as a ring gets. No one else will ever have the same stone as you.
We source the rough and have it cut to your spec. From rough to finished stone, it's made specifically for you.
Clint · Smiro Studio
If it doesn't exist, we'll make it.
The open market is finite. There are only so many diamonds in the world at any given moment, and sometimes the exact stone in your head just doesn't exist yet. When that happens, we don't talk you into a compromise. We source the rough and have it cut to your spec. It takes longer and it takes a little trust, but it means your diamond is genuinely one of one.
How it works
We talk it through
You describe the stone in your head. Shape, color, proportions, the feeling you're after.
We source the rough
We hunt down rough that can actually become that, and show you what's possible first.
It gets cut to spec
A master cutter shapes it to your numbers. You approve along the way.
IGI certifies it
The finished stone goes to IGI for independent grading and a certificate. Proof, on paper, of exactly what you own.
Sometimes the right stone isn't a diamond.
For clients who want deep, saturated color. Rubies, sapphires, emeralds, and beyond. We source natural gemstones with the same care we bring to diamonds. If you know what you want, we'll find it. If you're not sure yet, we'll help you figure it out.
Custom diamond questions, answered.
What is the bow tie effect in an oval diamond?
Almost every oval diamond has a dark shadow stretched across the middle. It's called a bowtie, or bow tie effect, and it happens when the facets in the centre don't return light. Most people just learn to live with it. We source and cut our ovals to kill it, so the stone stays bright from end to end. Side by side, you can't unsee the difference.
What is a Portuguese cut diamond?
A Portuguese cut has extra rows of facets, which means a lot more fire. We cut it on more than one shape. On a marquise it turns dramatic and vintage, on an oval it stays a little more classic. Plenty of cutters offer a Portuguese cut, we just happen to love it.
Can you cut a custom diamond from scratch?
Yes. When the exact stone in your head doesn't exist on the open market, we source the rough and have a master cutter shape it to your spec, with your approval along the way. The finished stone goes to IGI for independent grading and a certificate. It takes longer and it takes a little trust, but your diamond is genuinely one of one.
Do you work with antique diamond cuts?
We love them. Old-world faceting like the Portuguese cut and step cuts, plus our own crisscut Dutch marquise, a cut we built ourselves with sharp points, long clean lines, and a sparkle a standard marquise can't do.
Let's find the one.
Tell us the shape, cut and size you're dreaming of and get a free estimate in about a minute. Then we'll go find, or cut, the one that's yours.
Free Custom Ring Estimate
Next, tulip basketsFound the stone. Now the setting it deserves. Our tulip baskets cradle the diamond so it sits high and catches the light from every angle.Explore
Also, hand engravingThe basket holds the diamond. The engraving holds everything else. See the detail we cut in by hand, the part most people never notice until it's theirs.Explore
