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The marquise ring holds a unique place in the history of French jewelry. Its elongated silhouette, tapering into two symmetrical points, is one of the most recognizable shapes in the jeweler’s vocabulary and one of the designs most often reduced to a royal legend without much attention paid to its technical implications. Yet the marquise cut follows precise proportional rules and produces optical effects unique to this shape, interpreted differently by each major stylistic period. Buyers searching for an antique marquise ring in 18-carat gold or a navette-set unheated sapphire must understand criteria that generalist sellers do not always mention. This article explains them in detail.

The marquise cut, a shape born at the court of Louis XV

From Madame de Pompadour to today’s showcases: two centuries of continuity

The marquise cut takes its name from Jeanne-Antoinette Poisson, Marquise de Pompadour and official mistress of Louis XV. According to a legend repeated by several 18th-century jewelry historians, the king asked his jewelers to cut a diamond in the shape of a navette to resemble the smile of his favorite. The historical accuracy of this anecdote remains difficult to establish with certainty, but the connection between the cut and Madame de Pompadour is documented in the French Crown inventories and discussed in detail by Germain Bapst in his History of the French Crown Jewels (Hachette, 1889).

What is certain, however, is that the shape quickly became established in Parisian high jewelry, first through the houses of the Palais-Royal and later through the great workshops of Rue de la Paix in the 19th century. It endured through the Belle Époque in platinum and rose-cut diamonds, adapted to the geometric lines of Art Deco, and then returned strongly in the yellow gold creations of the 1960s and 1970s that can still be found today on the tables of Parisian antique dealers.

Navette cut or marquise cut: two names for one shape

The two terms refer to the same type of cut. “Navette” describes the shape itself, recalling the silhouette of a flat-bottomed boat seen from above. “Marquise” is the established jewelry term, the one found in gemological certificates and auction catalogs. In practice, both names coexist, and it is not uncommon for a dealer to refer to a “navette” when describing a colored stone cut in a marquise shape, especially when the piece is antique.

The technical characteristics of the marquise cut

Marquise-cut diamond

Proportions and length-to-width ratio: the first criterion to verify

The marquise cut has an optical characteristic that distinguishes it from most other fancy shapes: the elongated form increases the visible surface area without increasing the actual carat weight. A one-carat marquise diamond therefore appears noticeably larger than a round diamond of identical weight, which partly explains the enduring appeal of this cut among buyers seeking a balance between visual presence and budget.

For a marquise to be well proportioned, the length-to-width ratio should fall between 1.75 and 2.15. Below that, the stone appears too short and loses its elongating effect; above it, the stone seems too narrow and the points become mechanically fragile. Antique pieces sometimes show greater variation in these ratios, especially 19th-century navettes, which tended to adopt shorter and rounder shapes than the standards currently defined by the GIA (Gemological Institute of America).

The bow-tie effect, the optical flaw specific to the marquise cut

The bow-tie effect is the dark shadow that appears at the center of certain marquise-cut stones when light passes through them. It results from the orientation of the facets, which creates an area of light extinction visible to the naked eye under most lighting conditions. Neither the GIA nor the SSEF laboratory assigns a standardized grade to this effect on fancy shapes: its evaluation remains visual and requires observing the stone from several angles, something online sales photography rarely allows properly.

A pronounced bow-tie effect does not necessarily disqualify an antique piece, whose value may depend on other parameters, but it should be identified and mentioned in any serious appraisal.

V-prongs and protecting the points

The two points of a marquise are the most vulnerable areas of the stone. On antique settings, they are most often protected by V-prongs, which wrap around the tip without crushing it, or by double prongs that secure the point with two contact points. The condition of these prongs is the first thing to inspect when purchasing an antique marquise ring: a worn or slightly lifted prong exposes the point to chipping, and a poorly executed repair can alter the visual balance of the entire setting.

The antique marquise ring through the great stylistic periods

Belle Époque and Art Deco: the marquise during the golden age of Parisian jewelry

The Belle Époque period (1890–1910) marked the peak of the marquise in platinum. The settings from this era, often produced by anonymous workshops on Rue de la Paix or in the Palais-Royal district, combined a central navette with garlands of small rose-cut diamonds and openwork galleries bordered by delicate milgrain edges, giving the jewel an almost textile-like lightness. These pieces still appear regularly at public auctions, particularly at Artcurial and Hôtel Drouot, where they achieve prices reflecting the rarity of period platinum craftsmanship.

Art Deco (1920–1935) transformed the marquise into a strict geometric element. The navette became integrated into orthogonal compositions, flanked by baguette and trapezoid cuts contrasting with the central stone, with a sharp opposition between the top setting and the clean lines of the white gold or platinum mount. Blue sapphire and ruby marquise rings are especially representative of this period, during which color was used to reinforce the interplay of lines.

Colored marquises: sapphire, ruby, and emerald in navette cut

The marquise cut amplifies the pleochroism (the property certain crystals have of absorbing light differently and displaying various colors depending on the direction of the light rays striking them) of colored gemstones in a way few other cuts can match. In a Kashmir sapphire, the points concentrate color in a manner that creates chromatic variations enhancing the impression of depth. In a well-saturated Burmese ruby, the phenomenon is even more noticeable. For quality criteria relating to unheated and certified stones, the SSEF laboratory in Basel regularly publishes reference data on the geographic origins and thermal treatments of gemstones. These criteria are crucial for evaluating the value of an antique colored marquise whose stone often underwent no treatment at the time it was cut.

Buying an antique marquise ring: key points to verify

Purchasing an antique marquise ring requires checking several elements that outward appearance does not always reveal. Here are the points I systematically examine before adding a piece to the Les Pierres de Julie selection:

•The condition of the prongs at the points, which must be straight, securely soldered to the gallery, and free from excessive wear or clumsy repairs.

•The presence of maker’s marks and hallmarks, which certify the nature of the metal and can sometimes help date the piece or identify its original workshop.

•The cutting quality of the central stone, evaluated in particular through the intensity of the bow-tie effect, the symmetry of the points, and the regularity of the girdle (the thin part of a cut stone separating the crown from the pavilion).

•Any treatment applied to the stone, the absence of which constitutes a value-enhancing factor that only a certificate from a recognized laboratory can confirm indisputably.

•The balance of the setting, which should allow the ring to rest flat on the finger without turning, a common flaw in marquise rings whose shoulders are too light relative to the size of the top setting.

To learn more about reading hallmarks and their role in authenticating antique jewelry, our article on gold hallmarks details the essential marks to know before any purchase.

Marquise rings and heritage value: what auction sales reveal

Why antique marquise rings resist depreciation

A mass-produced jewelry piece undergoes significant depreciation on resale because its value largely depends on the brand rather than the piece itself. A high-quality antique marquise ring, whether signed or unsigned, follows a different logic: its value lies in the rarity of period craftsmanship and the intrinsic quality of the stone, two factors independent of any brand and impossible to reproduce identically.

Auction results show that Belle Époque and Art Deco pieces in the €2,000 to €10,000 range generally retain their value over ten years, provided the piece is well documented and properly maintained. The Hôtel Drouot website publishes the results of its antique jewelry auctions online, making it possible to track benchmark prices on the Parisian secondary market without intermediaries.

The role of gemological certificates in enhancing the value of a marquise ring

A marquise ring whose central stone is accompanied by a GIA or SSEF certificate systematically sells within a higher price range than an identical undocumented piece. For colored stones (sapphires, rubies, emeralds), the mention “unheated” on a recognized laboratory report can double or even triple the value of the stone compared to a treated equivalent. Experienced buyers understand this parameter well, while newcomers often discover it only after the transaction, making professional guidance all the more valuable.

Where to find an antique marquise ring in Paris ?

The marquise ring combines two qualities that few jewelry shapes can claim simultaneously: immediate visual presence and a documented history spanning three centuries. Whether it is a Belle Époque platinum navette, an SSEF-certified unheated sapphire marquise, or an Art Deco white gold and diamond piece, every example deserves careful examination before purchase. At Les Pierres de Julie, in the Village Suisse in Paris, every ring is inspected from these perspectives before entering the showcase.

To discuss a specific piece or request an appraisal, contact our boutique directly via our contact form.