Old European Cut Diamond — The Antique Round Brilliant
Old European Cut Diamond — The Antique Round Brilliant
A diamond fashioned in the round, high-crowned style of the late nineteenth and early twentieth centuries
An old European cut diamond is a diamond fashioned in the old European cut style, the round brilliant pattern that dominated fine jewellery from approximately 1880 through the early 1930s. The terminology is sometimes used as a synonym for the cut itself, and sometimes specifically to refer to the diamond — the physical stone — fashioned in that style. The two phrases are largely interchangeable in trade usage. What distinguishes an old European cut diamond from a modern round brilliant is the proportions: a circular girdle, a higher crown, a smaller table, an open culet, and the handworked facet placement of pre-Tolkowsky cutting practice.
Identifying an old European cut diamond
Several visual cues distinguish an old European cut from the modern round brilliant. Looking face-up through the table at low magnification, an old European typically shows a small dark circle at the centre — the open culet, viewed end-on through the diamond. The table itself looks small relative to the girdle diameter, and the crown rises noticeably above the girdle plane. From the side, the crown angle is steeper than a modern brilliant and the total stone is taller in proportion to its width. Under loupe magnification, the eight bezel facets, eight star facets, and sixteen upper girdle facets of the crown — together with the matching pavilion facets — show the slight irregularities and subtle asymmetries of handwork rather than the precise geometry of modern computer-guided cutting.
Where they came from
Old European cuts were produced in the major diamond-cutting centres of the period — Antwerp, Amsterdam, London, New York, and Idar-Oberstein — using bow-driven scaifes and incremental hand-finishing. The rough material came predominantly from South African production after the Kimberley discoveries of the late nineteenth century, with earlier and concurrent production from Brazilian and Indian sources. The cutters of the period worked to a stylistic ideal — the round brilliant as understood before the calculated proportions of Tolkowsky — rather than to a measured numerical standard. Variation between individual stones is therefore substantial, and a population of old European cut diamonds spans a meaningful range of crown heights, table sizes, and culet diameters.
In the contemporary market
Loose old European cut diamonds trade at the old-cut discount to modern round brilliants of equivalent weight, colour, and clarity — typically 10 to 30 per cent. The discount narrows for well-cut examples with strong light return and pleasing optical character; it deepens for stones with conspicuous symmetry issues, damaged culets, or worn girdles. Re-cut old Europeans graded as modern brilliants generally trade at the modern price grid, but the re-cutting process consumes 15 to 25 per cent of the original weight and destroys the historical character of the stone.
In their original settings — Edwardian platinum filigree pieces, early Art Deco geometry, late Victorian mountings — old European cut diamonds carry the premium of the antique jewellery they constitute. Removing the diamond from the original setting captures the loose-stone discount but loses the antique-jewellery premium. For period-correct restoration, replacement old Europeans of suitable character are the standard solution.
Care
Old European cut diamonds are durable like all diamonds, with hardness of 10 on the Mohs scale, but the open culets and high crowns of the cut can leave the diamond more vulnerable to chipping at the culet point and at the table edges than a modern brilliant. We recommend professional cleaning by ultrasonic, careful handling around hard surfaces, and periodic inspection of original platinum mountings for prong wear.