Cut registry › Historic cuts › Old European
Historic cuts · The antique round
The one that got close.
The old european is the last cut before the modern one, and on our census it finishes 0.78 points from Tolkowsky’s ideal. What closed the gap was not facets. It was being round.
The short version
An old european cut diamond is a hand-finished antique round brilliant with 58 facets, a high crown, a small table and a visible culet, cut roughly between 1890 and 1930.
It is the direct predecessor of the modern round brilliant, and the first cut in the line that is genuinely circular in outline.
Definition
Tolkowsky covers it at pages 23 and 24 of Diamond Design, and the change he records is mechanical rather than aesthetic: bruting machines made it possible to grind stones "absolutely circular in plan". Before that, round was an approximation.
Its markers are a round outline, a small table, a high crown, a short lower girdle and an open culet visible as a dark point at the centre. Against a modern brilliant it looks slightly softer and slightly darker in the middle, with larger and more readable flashes.
Most old europeans were cut between 1890 and 1930, which places them across the Edwardian and Art Deco periods. They are more available than old mines, which is reflected in price.
Two facet counts, and both are right. The historic count omits the girdle, because a hand-bruted stone had no faceted girdle to count. Our model resolves the girdle as real surfaces, so the census reads 74. Where a figure below depends on facet count, it is the measured number that produced it.
Proportions
Trade description on the left, our reconstruction on the right. Note the table figure: a small table under a high crown is the single most reliable marker of the cut.
| Measure | Commonly cited | Our reference stone | What it does |
|---|---|---|---|
| Outline | round | round | The first genuinely circular cut in the line. |
| Historic facets | 58 | 74 measured | The difference is the girdle. |
| Table | small, commonly 38% to 48% | 45.0% | A wide table on an apparent OEC is a warning sign. |
| Depth | high crown, deep pavilion | 64.7% | Deeper than a modern brilliant. |
| Pavilion angle | steep by modern standards | 41.5° | Close enough to work, unlike its ancestors. |
| Culet | open, small to medium | modelled | Visible face-up as a dark point at the centre. |
No laboratory issues a cut grade for an old european. The report will record colour, clarity, carat, symmetry and polish, and will usually describe it as a round brilliant or an old european brilliant. Cut quality on an antique stone is judged by eye, which is precisely the gap this page tries to fill with a measurement.
Light
Measured on the census that runs on every cut on this site: 3,200 rays face-up, 2,200 at 20° tilt, on exact facet geometry, against T57 as the standard.
| Material | Useful light | Leak | Fire | Scintillation | Global | vs the standard |
|---|---|---|---|---|---|---|
| Diamond | 90.26% | 5.25% | 73.54 | 80.69 | 87.82 | −0.78 |
| Moissanite | 78.94% | 9.06% | 95.24 | 80.69 | 89.05 | −0.77 |
| Cubic zirconia | 91.63% | 7.22% | 83.64 | 80.69 | 89.81 | −1.97 |
| T57 standard, diamond | 92.28% | 1.88% | 78.85 | 71.82 | 88.61 | 0.00 |
The old european finishes 0.78 points from Tolkowsky’s 1919 ideal: 87.82 Global against 88.61. That is the closest any historic cut comes, and it is closer than every jewellery shape we publish. It returns 90.26% of entering light against the standard’s 92.28%.
The jump is thinness, not facets. It carries the same 58 historic facets as the Peruzzi and the same 74 measured. What changed is that leak falls from the Peruzzi’s 5.25%-scoring ancestors down to 5.25% here. Nothing about the facet plan moved. The stone simply stopped being a squashed square.
That is the finding this whole section exists to show. Three centuries of adding facets, from the single cut’s 78.79 through the Mazarin’s 74.88 to the Peruzzi’s 78.49, moved Global almost not at all. One mechanical change, the bruting machine, moved it 87.82. Being able to make a stone round was worth more than three hundred years of facet work.
It keeps the antique character. Scintillation reads 80.69 against the standard’s 71.82, so it out-sparkles the 1919 ideal on sixteen measured girdle facets the knife-edge standard has not got. Fire goes the other way, 73.54 against 78.85: a small table under a high crown throws fewer, broader flashes rather than more colour overall. Larger flashes from a slightly darker stone is exactly what buyers describe, and here it is as figures.
Where the light is: useful return across the face
Five equal bands across the diameter. The old european returns 93.4% across the centre against 78.5% at the edges, so unlike its ancestors it is bright in the middle and gives up light at the rim. A modern round brilliant reads 99.1% against 98.1%. The old european is the first cut in this line whose centre is not the dark part.
Against the standard
Light return. 90.26% against the standard’s 92.28%, for a Global gap of only 0.78 points. No other historic cut and no jewellery shape we publish gets this close.
Sparkle. 80.69 against 71.82, and the old european wins, on sixteen measured girdle facets the knife-edge standard has not got.
Fire. 73.54 against 78.85, and here the old european loses. Its flashes are broader and fewer, which reads as character rather than as more colour.
Face-up size. An old european looks smaller for its weight than a modern brilliant, because more of the weight sits in crown height and pavilion depth.
Movement. 93.02 against 90.41. It holds its return under tilt slightly better than the standard does.
The baseline for all of this is the round brilliant itself. Its facet plan is set out in the anatomy of a round brilliant, and the measured standard we compare against is T57, the stone Tolkowsky published in 1919.
Materials
In moissanite the old european returns 78.94% for 89.05 Global, with fire climbing to 95.24. Antique-style rounds are widely made in moissanite, and the combination of a small table, a high crown and a high-dispersion material is a deliberate one.
In cubic zirconia it returns 91.63% for 89.81 Global, leaking only 7.22%.
Compare all three for this cut in the Index.
Trade-offs
Questions
The questions buyers actually ask, answered in full. Where the answer is ours to prove, the figure is measured on the Index; where it is an established gemological fact, it is stated as one.
An old european cut diamond is a hand-finished antique round brilliant with 58 facets, a high crown, a small table and an open culet, cut roughly between 1890 and 1930. It is the direct predecessor of the modern round brilliant and the first cut in the line that is genuinely circular in outline.
The old european is round with a smaller culet; the old mine has a soft square or cushion outline and a large open culet. The performance difference is large and measurable: we put the old european at 87.82 Global against the old mine’s 74.31, on identical protocol. Being round is worth more than any facet change in this lineage.
They sparkle differently, and on our measurements they sparkle more. Scintillation reads 80.69 against the 1919 standard’s 71.82, so they throw more separate flashes. What they give up is white light return, 90.26% against 92.28%, and fire, 73.54 against 78.85. Larger, slower flashes from a slightly darker stone.
Look for a round outline with a small table, a high crown, short lower girdle facets and an open culet showing as a dark point at the centre when you look straight down. A wide table on a stone described as an old european is the most common warning sign, since a modern brilliant recut is often sold as one.
The culet was polished as a facet rather than closed to a point, which protected the fragile tip during cutting, handling and setting. Face-up it appears as a small dark circle at the centre of the stone, and it is one of the clearest markers that a round stone is genuinely antique rather than a modern recut.
Per carat, generally yes for good examples, because supply is fixed and demand for antique stones has risen. They are usually less expensive than old mine cuts of similar size and quality, because more of them survive.
No. GIA will grade the stone and typically describe it as a round brilliant or an old european brilliant, recording colour, clarity, carat, symmetry and polish, but it issues no cut-quality grade for antique cuts. That absence is why we measure them.
On our census, 0.78 points of Global: 87.82 against Tolkowsky’s 1919 ideal at 88.61. That is closer than any other historic cut and closer than any of the eleven jewellery shapes we publish. It is a genuinely high-performing cut, not merely a charming one.
They were superseded rather than abandoned. Tolkowsky published the proportions that solved light return in 1919, and the trade progressively adopted them: a shallower crown, a wider table, a closed culet and a shallower pavilion. The old european is what cutters were making immediately before that arithmetic arrived.
Yes. The cut is a facet plan, so it can be applied to any material, and antique-style rounds are cut in lab-grown diamond and in moissanite today. In moissanite our reconstruction returns 78.94% for 89.05 Global, with fire climbing to 95.24.
Next
See the whole set on the historic cuts index, or the measured house and historic cuts in the cut registry.
Method
Monte-Carlo on exact facet geometry: 3,200 rays face-up plus 2,200 at 20° tilt, cosine-weighted from a 7° near-vertical cone. Useful light is what exits through the crown within 64° of vertical. The same protocol runs on every cut on this site, so the figures are comparable to each other.
They measure our reference geometry for the shape at the proportions listed above, not an average of stones on the market. A old european cut to different proportions will read differently. Treat them as a like-for-like comparison between shapes, not as a grade for any individual stone.
Engine estimates, ±2 points, not lab-certified grades. We do not publish the Index symmetry axis on these pages: it scores facet regularity within each pavilion family, which is meaningful for a round brilliant and misleading for a shape whose pavilion is deliberately irregular.
80.69 here against the standard’s 71.82. The term is 100(1−e−n/45) on the count of facets that actually reach the surface, so it is a pure function of facet count and nothing else.