What classy actually means
Prettiest is a question about the moment you look at the ring. Classiest is a question about the twentieth year: whether the thing on the hand still reads as a decision, or reads as a date. Put that way it stops being a matter of opinion, because we can check which shapes have been cut without interruption for a century and which ones arrived, peaked and went away.Four shapes come out of that test intact: the round brilliant, the emerald cut, and the two antique brilliants, the old mine and the old European. Not because they are the most beautiful. Because no decade owns them. A shape that was never fashionable cannot go out of fashion, and each of these has been in ordinary production long enough that nobody can date a ring from the outline alone.
If you want one nameThe emerald cut, in a plain platinum or white gold solitaire. It has the longest lineage of the four, it carries no ornament that can go out of style, and it has survived a hundred years of taste without ever once being the popular choice. If you would rather nobody ever thought about the shape at all, the round brilliant does that job and always has.
Which is a different question from the prettiest cut. That one has no answer, and we take it apart in the prettiest diamond cut, with all nine shapes drawn at one carat to one scale. This guide is about the other half: durability of taste.The three that have never dated
The test is boring and it works. How many years has each shape been in ordinary commercial production, and were there gaps?
Four shapes here have outlived everyone's taste, and none of them did it by being the popular choice.The two antique brilliants are a special case, because they did go away. Old mine and old European cuts were the standard until electric light and better saws made the modern round possible, and then they stopped being cut almost entirely for eighty years. They came back in the last decade, and the reason they still do not read as dated is that they predate every decade anyone alive can place. A hand-cut stone with a small table and an open culet does not look like 1890 to a stranger. It looks like it was chosen.
When each shape was worked out, and how long it has stayed in useOrigin years are the dates the trade gives for when each cut as we know it was worked out. The bars are ordinary commercial production, not the occasional stone cut to order, and the revival dates for the antique brilliants and the asscher are our reading of when they came back into retail rather than a published series.
The round brilliant has the cleanest record. Marcel Tolkowsky published the proportions in 1919, in a book about the mathematics of light rather than about fashion, and nothing has replaced them since. It is still the only shape GIA issues a cut grade for, which is a small technical fact with a large practical consequence: it is the one shape where the report tells you whether the stone was cut well. It is also the shape that resells most easily here, because it is the one every buyer recognises.The emerald cut is older than its name. Step cutting, meaning long flat facets lying parallel to the girdle instead of the kites and triangles of a brilliant, was being used on emeralds in the 1500s, and the diamond version inherited it. What matters for this question is that it has never had a peak to fall from. It has sat at a few per cent of the market for a hundred years, which is exactly why it gets called timeless by people who have never owned one. Our emerald cut guide covers what it costs to buy one properly.Shapes a stranger cannot date
Shapes with a decade attached
Old mine brilliantCut from the 1700s
The standard until electric light and modern saws, then barely cut for eighty years, and back in the mainstream since about 2015. It predates every decade anyone alive can place, so the gap does not show on a hand.
Old European brilliantAbout 1890
The last of the hand-cut rounds, and the same story: gone by the 1930s, back in the last decade, unplaceable to anyone who is not a gemmologist.
Emerald cutNamed in the 1920s
Descended from step cuts used on emeralds in the 1500s. It has sat at a few per cent of the market for a century, which means it has never had a peak to fall from.
Round brilliantProportions published 1919
More than a century of unbroken production, with no interruption and no rival. It is still the only shape GIA issues a cut grade for.
Oval brilliant1957
Cut for sixty-nine years and fashionable for the last eight. Unbroken production is necessary for a shape to age well and clearly not sufficient.
Princess1980
Still cut and still available, and now the shape most often described to us as someone's mother's ring. Forty-six years is long enough to date a ring and not long enough to outlast a decade.
AsscherPatented 1902
Two bursts, thirty-six years and eight, with sixty-four years of silence in between. Both bursts are datable on sight, which is the opposite of what people mean when they call it a classic.
1700
1800
1900
2000
The shapes that carry a decade with them
The opposite of classic is not ugly. It is legible. A dated ring tells a stranger roughly when it was bought, and it almost never does that through the shape alone. It does it through a combination: shape, setting and metal arriving together.
Four looks, and the year each one gives awayWhich look belongs to which year is our reading of what comes through our own inbox and workshop, not a survey. Each shape is drawn at one width and lengthened by its own ratio, so the glyphs read as identity marks rather than as a size comparison.
The princess is the clearest case, and the one people ask about most nervously. It was the second most popular shape on the market for most of the 2000s and it has been the sharpest faller in every dataset since. Nothing about it got worse. It got counted, and a shape everybody bought in one decade is a shape everybody can date.The pillowy square cushion did the same thing ten years later, which matters because the word on the report has not changed. A square cushion at a ratio of 1.02 and an elongated one at 1.35 are the same line of text and quite different rings, so the ratio is the number to ask for. The halo is the harshest of the three, because it is not a shape at all. It is an ornament, and ornaments have years.2000sPrincess cut, channel-set square stones running into a white gold bandThe channel. A row of small square stones sunk flush into the shoulders is the detail that fixes the year, more than the centre stone does.
2012A halo of small stones around a smaller centre, usually in white goldCatherine's sapphire halo was on every front page in 2011 and the look was on every counter by the following year. A halo is not a shape, it is an ornament, and ornaments have years.
2010sPillowy square cushion on a split shank, micro pavé along both halvesThe band dividing in two before it reaches the stone. Worth knowing that the report still just says cushion: an elongated one at 1.35 is a different ring entirely.
2020sElongated oval or old mine brilliant, plain band, often yellow goldThe two most photographed silhouettes in the world right now, which is exactly what will date them. We are not exempt from our own argument here. Ask us again in 2035.
Worth saying plainlyNone of these are badly made stones. A well-cut princess in a plain solitaire will age better than a beautiful emerald cut inside a 2012 halo, because the halo is the part carrying the year. If you love a shape that had a decade, buy it and put it in a setting that did not.
The least popular diamond shape
The heart, and it is not close. In The Knot's 2026 Real Weddings study of more than 10,000 United States couples married in 2025, reported by National Jeweler, heart and asscher and every remaining shape share about 5 per cent of the market between them, and the heart sits last in every other dataset we can find as well.The reasons are mechanical rather than aesthetic. Below about a carat the cleft stops reading and the stone looks like a rounder shape somebody notched. The two lobes are also the hardest symmetry in the trade to cut evenly, so the failures are common and visible from a metre away. And a heart is the only shape that says something out loud, which narrows the number of people who want to wear it every day for forty years.Just behind it sit the asscher and the marquise, and those two are unpopular in completely different ways. The marquise is unpopular the way a shape is when people admire it and then buy something else: it is rising again, it reaches further up a finger per carat than anything on the market, and it has now been rediscovered twice. The asscher is unpopular for reasons that hold up under checking, which is the next section.
Unpopular and bad are not the same thing
One more thing about all of these numbers. No Australian survey of diamond shape exists, so any local percentage you are quoted has been borrowed from America or invented. What does reach us is supply rather than taste: a shape having a moment overseas gets harder to source well here for a season or two, and the quiet shapes are quiet everywhere at once.What a small share does not cost you
Quality. The same cutters make the same grades in every outline, and an unfashionable shape is not a lesser stone.
A readable report. IGI grades cut on fancy shapes, so you can still check polish, symmetry and proportions rather than guessing.
Durability, mostly. The real exception is a point: a marquise or pear tip wants a claw over it in any decade.
What it does cost you
Choice. Fewer stones get cut in a shape nobody is asking for, so at one weight and grade you are picking from a handful rather than hundreds, and the good ones go first.
Time. Sourcing a genuinely well-cut example in a quiet shape takes weeks here rather than days.
Resale. A shorter queue and a lower number if you ever sell, which matters more for a natural stone than a lab-grown one.
Why the asscher cut is not popular
Start with what it is, because half the confusion lives in the name. An asscher is a square emerald cut: the same step facets, the same cropped corners, arranged around a square outline over a deeper pavilion. Joseph Asscher patented it in Amsterdam in 1902, it was one of the two shapes that defined Art Deco jewellery alongside the emerald cut, and it had essentially stopped being cut by the late 1930s.It came back once, and two things brought it back. In 2001, for the firm's centenary, Edward and Joop Asscher released the Royal Asscher cut, which adds sixteen facets to the original fifty-eight for a higher crown and more brilliance, and which the family trademarked so that only they can cut it. Then Aidan proposed to Carrie Bradshaw with a three carat Harry Winston asscher, and a shape that had been sitting in estate trays for sixty years was suddenly on television every week. Every article written since has also reached for Elizabeth Taylor's 33 carat Krupp diamond, an asscher Richard Burton bought her in 1968. The revival lasted about eight years. Then it stopped, and unlike the marquise or the old mine it has not come back a second time. Four things explain that, and three of them have nothing to do with fashion.
One carat, three ways, drawn to one scaleWell-proportioned 1.00 ct stones, long axis vertical, with the round set to 100Millimetre figures are the published averages for a well-cut 1.00 ct stone in each shape, and an individual stone runs a few tenths either side. Each area is calculated from the outline drawn above it rather than estimated alongside it.
The first reason is the drawing. An asscher carries its weight in a deep pavilion under a small face, so at one carat it covers roughly a sixth less finger than either a round or an emerald cut of the same weight. That is the largest face-up penalty of any shape on the counter, and it arrives at exactly the moment a buyer is comparing two stones on a screen by carat weight alone.Asscher5.5 × 5.5 mm27.8 mm² facing up, index 84The deepest pavilion of the three, so the least of the carat ends up where anyone can see it.
Emerald7.0 × 5.0 mm33.9 mm² facing up, index 102The same step facets, laid out long. It covers more finger than anything else here at the same weight.
Round6.5 × 6.5 mm33.2 mm² facing up, index 100The stone every buyer's eye is calibrated to, and the one the index is set against.
What people actually tell us about the asscherThe four objections as they arrive in our inbox, ordered by how often we hear them. The chip says how much of each one survives checking.
Reasons two and three are both about what step facets do. An asscher's facet plan is the right-hand drawing below, squared off: a handful of big flat planes lying parallel to the table, rather than dozens of small mirrors tilted in dozens of directions.01It is smaller, and this is the objection with a number behind it. The weight sits under the stone in a deep pavilion, where nobody looks.
“It looks smaller than the others”
Holds
02Step facets are windows. An asscher shows an inclusion, and any warmth in the body colour, with nowhere to hide. It needs a clarity and colour grade that a brilliant at the same price does not.
“I can see things in it”
Holds
03It returns light in slow broad flashes rather than glitter, which is the entire point of a step cut and precisely what a fifteen second phone video fails to capture. Calm in the hand, dull on a screen.
“It does not sparkle enough”
Holds, sort of
04True about the market and silent about the stone. Buyers have moved from square outlines towards elongated ones across every shape family, and the asscher is the squarest thing on the counter. That is a reason it is cheap, not a reason it is worse.
“Square shapes look dated”
Fashion
Two facet plans, seen from aboveFacet counts are the GIA figures for the standard versions of each cut. Both are 57, which is why counting facets tells you nothing about sparkle.
Those planes are windows, and that has a price. An inclusion or a warm tint has nowhere to hide in an asscher, so it needs higher clarity and colour than a brilliant at the same money to look right. The light it returns also arrives as slow broad flashes rather than glitter, which is calm in the hand and flat on a phone video, and most stones are now chosen from a phone video.Round brilliant57 facetsTriangles and kites, each one tilted out of the plane of the table. Light that goes in comes back at you from dozens of small mirrors pointing in dozens of directions.
Emerald cut57 facetsLong steps running parallel to the table and to each other. The same light comes back off a handful of big flat planes, so you get broad flashes instead of scintillation.
If you want one anywaySpend on the grades rather than the weight. VS1 clarity and G colour at a carat, one step tighter than we would ask of an emerald cut the same size, and ask for a video of the actual stone tilting under ordinary room light instead of under a lightbox. The grade floors for the emerald cut are the same idea with a little more room for error than an asscher gives you. One thing to know before you compare prices: almost every stone sold as an asscher is a plain square step cut with the original fifty-eight facets, not the trademarked seventy-four facet Royal Asscher. Both are legitimate, they are not the same stone, and only the trademarked one carries an inscribed Royal Asscher number. If a seller is charging for the name, ask to see it.
Fashion, not merit
There is a counterpoint we should make, because it cuts against the tidy version of this story. The expensive part of a step cut has always been the clarity and colour it needs, and lab-grown has made high clarity ordinary rather than rare. That is most of the reason the emerald cut has gone from a rounding error to roughly one couple in twelve in five years.If the asscher's problem were the cost of the grades, the same shift would have lifted it too. It has not. Both shapes became affordable to buy well at the same moment and only one of them moved, so whatever is left is not merit. It is that the market has spent a decade walking away from square outlines towards elongated ones, and the asscher is the squarest shape on the counter.
Our readingTake that both ways. It is the honest reason not to expect an asscher to hold its number the way a round does. It is also the reason an asscher is the best value orderly step cut you can buy in Australia right now, if you happen to be the person who wants a calm square stone and does not need anybody else to agree.
Buying for the long version of your taste
Separate the two decisions. The shape is the slow half. The setting is where a ring picks up its year, and halo, split shank, channel-set shoulders, band width and metal all move faster than shape does. They are also cheaper to change: a jeweller can reset a diamond into a new mount in a fortnight, and nobody can recut it into a different shape without losing weight.Then three questions, in this order. Would you still choose this shape if nobody else could see it. Does the setting have a feature you could put a year to. And can you see the actual stone moving, under the light in your own kitchen rather than under a showroom spotlight. Showroom ceilings are hung with lamps, the one condition in which every shape performs.
Our answer, since it would be evasive not to give oneAn emerald cut or a round brilliant in a plain four or six claw solitaire, in platinum or white gold, at whatever weight the budget reaches without dropping the clarity. If you want the antique version of the same answer, an old mine brilliant in a yellow gold bezel has already outlived everyone's taste once. And if what you love is a princess or an asscher, buy it. A ring you chose beats a ring you hedged, and the only person who has to stop noticing the decade is you.
Not sure whether a shape is classic or just current?Send us a photograph. We will tell you what shape it is, whether the thing dating it is the stone or the setting, and what the same ring costs here without the part that will look like a year.
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