Beyond the classic round brilliant and popular fancy shapes like oval and emerald, there exists a fascinating world of diamond shapes. Over time, cutters and designers have experimented with geometry, symmetry, and movement to create shapes that serve specific design purposes. These unique shapes—fan, whistle, bullet, briolette, trapezoid, and drop—offer distinctive aesthetics for those seeking truly uncommon jewelry designs. Each brings its own history, characteristics, and visual impact to fine jewelry.

Fan Diamonds

Similar in shape to a shield cut, a fan diamond has a flat top, triangular silhouette and curved base that resembles the shape of an open fan. The facets are laid out in a radiating fan-like pattern. Fan diamonds exhibit a vintage-inspired look and radiate a sense of movement and ornamental detail. The exact number of facets varies, and the cuts of a fan shaped diamond don’t necessarily align with the specs of a brilliant cut or step cut diamond.

Key Characteristics:

• Two flat edges and one convex curved edge

• Fan-shaped design that is ideal for decorative settings.

• Distinctive, design-led personality

• Associated with antique jewelry

• Usually cut as smaller stones for use as accents

How Fan Diamonds Are Commonly Used

In diamond rings, fan cut diamonds are most commonly used as side or accent stones rather than as center stones. Their spread silhouette and tapered structure make them better suited to framing a focal diamond than serving as the primary centerpiece. Fan cut diamonds are often used in diamond necklaces and earrings, where their spread, decorative shape enhances movement and visual impact.

Fan cuts are well-suited to three-stone settings, where they often flank an emerald, cushion or radiant cut center stone to create a graceful, fan-like tapered look. Often sold in pairs, fan shaped diamonds must be precisely cut for perfectly matching symmetry.

Who Is It Perfect For?

Fan cuts are specialized accent stones and can be harder to source than some of the more common cuts used as side stones. This makes them ideal for jewelry wearers who want a ring with a distinctive, seldom-seen aesthetic. Often associated with antique or custom-designed diamond jewelry, fan cut diamonds appeal to collectors of unusual vintage jewelry, those seeking Art Deco aesthetics, and anyone wanting a truly unique ring design. They're ideal for jewelry enthusiasts who are drawn to pieces that showcase creative diamond cutting rather than maximum brilliance.

Whistle Diamonds

The shape of a whistle diamond is generally an elongated, right-angled trapezoid. The outline can be likened to half of a pentagon, with two right-angled bottom corners, two parallel sides, and a sharper angle forming the topmost corner. Usually used as accent stones, whistle cuts have a geometric, architectural form that appeals to those who prefer angular, nontraditional designs.

Facet patterns vary, but they typically feature step cuts that create mirror-like light reflection rather than the maximum sparkle of a brilliant cut.

Key Characteristics:

• Shape resembles half of a pentagon

• Facet pattern varies, but usually features step cuts

• Vintage or Art Deco look

How Whistle Cut Diamonds Are Commonly Used

Whistle cut diamonds are typically used as accent stones in directional or asymmetrical designs, where their taper enhances visual flow. They’re most commonly seen as a supporting element in three-stone engagement rings, as accent diamonds in Art Deco-inspired designs, and in channel-set bands or eternity rings. The shape also works well in other types of fine jewelry, including pendant necklaces and diamond earrings. The nontraditional outline of this cut makes it well-suited to art-inspired bespoke and custom jewelry.

Whistle cut diamonds have one of the sharpest points of any diamond cut, and the narrow upper tip is vulnerable to breaking. As a result, they are often channel-set or surrounded by bezel settings to protect them.

Who Is It Perfect For?

Whistle cuts are angular and nontraditional, appealing to those who value individualism and prefer to avoid the most common diamond cuts. In many cases, whistle cut diamond rings have an Art Deco or vintage-inspired aesthetic, making them perfect for rings with a vintage vibe.

Bullet Cut Diamonds

Offering chic Art Deco charm, bullet diamonds are a glamorous choice that is often more popular in earrings than in diamond rings. A bullet diamond is essentially a baguette-shaped stone (or triangular-tapered step-cuts) with one end cut into an angled V shape, creating a silhouette reminiscent of an unshot bullet or an elongated, skyscraper-like form. Most bullet cuts feature step faceting, with long, parallel facets that produce a hall-of-mirrors effect, though precise facet patterns can vary.

Key Characteristics:

• Bullet-shaped outline like baguette cut with an angled top

• Step-cut facets

• Strong architectural presence

• Creates visual flow toward or away from the center stone

• Sharp point often protected by bezel settings

How Bullet Cut Diamonds Are Commonly Used

Bullet-shaped diamonds are most often used as side or accent stones. In rings, they help elongate the design and can make the center stone appear larger and more impactful. They are commonly paired with other step cuts, such as emerald or Asscher cuts, to maintain a cohesive geometric look.

Because they are predominantly used in three- or five-stone settings, bullet cut diamonds are typically sold in matched pairs. When selecting them, look for excellent symmetry and clean lines. Color and clarity should closely match the center stone, especially since step cuts tend to reveal inclusions more readily.

Who Is It Perfect For?

Anyone who finds the glitz and glamor of the Roaring Twenties appealing should consider the bullet cut. The clean, geometric lines of the bullet cut may also entice jewelry wearers who seek a sophisticated alternative to traditional tapered baguettes.

Briolette Diamonds

Briolette diamonds are among the rarest and most distinctive diamond cuts, with a history dating back hundreds of years. Shaped like a teardrop or elongated pear and covered in triangular facets across the entire surface, the briolette has no table, culet, or flat face. Instead, it is fully faceted all around, allowing light to reflect from every angle.

Unlike traditional cuts designed for rings, briolette diamonds are typically created to dangle in drop earrings or pendants, where they shimmer freely as they catch the light. They are also among the most expensive cuts, as crafting one requires a large, exceptionally clean piece of rough diamond. Because every surface remains visible once finished, inclusions, symmetry issues, or cutting imperfections are easily detected, leaving little room for error.

Key Characteristics:

• Teardrop-like shape

• Triangle-shaped facets cover the entire surface

• Light reflects from all angles, creating exceptional brilliance and sparkle

• Among the rarest and most difficult cuts to make

History

The briolette cut is one of the oldest known diamond cuts, with records dating back to 12th-century India. Although the term “briolette” didn’t come into common usage into the 1800s, the 17th-century French gem merchant Jean-Baptiste Tavernier described diamonds “cut with facets on all sides” and “round pendants with little facets” during his travels in India.

How Briolette Diamonds Are Commonly Used

Briolette cut diamonds are designed to dangle rather than being mounted in a traditional prong setting, and many briolettes feature a drilled hole at the narrow end for suspension. They are often associated with high jewelry, usually used to create elegant necklaces, drop and chandelier earrings.

Who Is It Perfect For?

Briolette diamonds occupy a niche defined by quiet luxury, appealing to collectors who value history, craftsmanship, and individuality over immediate visual impact. Lovers of antique jewelry and timeless elegance will love the 360-degree shimmer of a briolette cut diamond. This cut is most common in genuine vintage and antique jewelry, including pieces from the Victorian era. Many modern designers have come to favor them for their elegance and ability to create a fluid display of light.

Trapezoid Diamonds

The trapezoid is a four-sided, geometric cut with two sides that are parallel and two that slant inward. Another way to think of the shape of a trapezoid cut is that of a triangle with its top point cut off.

Trapezoid diamonds offer maximum finger coverage and can enhance the perceived size of center stones, which is why they’re commonly used as side stones. This diamond shape is extremely versatile and remains a unique choice for those who like clean, angular lines and a sophisticated, nontraditional look.

The majority of trapezoid cut diamonds are created using step cuts similar to an emerald cut, which creates an effect like a hall of mirrors. In some cases, trapezoid diamonds are also cut with brilliant-style triangular or kite-shaped facets.

Key Characteristics:

• Four-sided geometric shape

• Usually step cut, but can also be brilliant cut

• Clean angular structure

How Trapezoid Cut Diamonds Are Commonly Used

While it is possible to design a trapezoid diamond ring with a single trapezoid as the centerpiece — often set east-to-west in a solitaire — this cut is far more commonly used as an accent stone.

Trapezoid diamonds add width and definition when placed as side stones, most often in three-stone engagement rings where they create a clean, tapered transition toward the center. They are also used in five-stone rings with bullets or baguettes, in channel-set bands, and to flank colored diamonds or gemstones, making them especially well suited to Art Deco and vintage-inspired designs.

Step-cut trapezoids pair naturally with emerald or Asscher cuts, while brilliant-cut trapezoids complement princess, cushion, or radiant centers. Celebrities have embraced the look as well — Jennifer Lopez’s over six-carat pink diamond engagement ring from Ben Affleck featured two trapezoid-cut white diamonds as side stones.

Who Is It Perfect For?

Many shoppers choose trapezoid side stones for their ability to add “weight” or perceived size to the center stone. Trapezoid cut diamonds are often considered an alternative to trillions or baguettes. They're ideal for those seeking substantial side stones with more presence than baguettes, a great pick for sophisticated buyers who appreciate geometric elegance, and anyone wanting a comfortable side stone that doesn't extend between fingers like trillions can.

Drop Cut Diamonds

With their teardrop-like silhouette, drop cut diamonds resemble both pear cut and briolette cut diamonds, and the terms are sometimes mistakenly used interchangeably. In reality, they are distinct. A briolette is a specific type of drop cut featuring triangular facets that cover the entire surface of the stone. A pear cut, by contrast, is a traditional flat-faced cut with a defined table, girdle, and culet, making it better suited to engagement rings.

Elegant and timeless, drop cut diamonds are most commonly used in pendant necklaces and earrings, where their movement enhances their brilliance and visual impact.

Key Characteristics:

• Elongated teardrop shape and an elegant aesthetic

• Balanced curve and pointed tip

• Faceted all around (exact number of facets varies)

• Excellent sparkle and brilliance

How Drop Cut Diamonds Are Commonly Used

Drop cut diamonds are best suited for use in pendants and earrings, much like briolette diamonds. Their rounded, elongated shape is designed to catch the light when in motion, creating a dazzling effect. Some drop cuts may have a flattened end in place of a briolette’s sharp point, and they may be drilled near the top for suspension in jewelry.

Who Is It Perfect For?

Drop cut diamonds appeal to a wide range of aesthetics, but they tend to be favored by wearers who value understated sophistication and a sense of quiet individuality in their jewelry choices. Drop cut diamonds are also suited for those who want jewelry that feels graceful, timeless and elegant rather than bold or heavily structured.

FAQs

How do I choose the right diamond cut?

Choosing diamond cuts is a highly personal decision. Consider your personal aesthetic, finger shape and setting preference. Viewing various shapes in person or comparing high-quality videos can help you understand how each cut reflects light and suits your overall style.

Are less common diamond cuts more expensive?

In many cases, nontraditional and uncommon cuts tend to be less expensive than round brilliant cuts. Prices depend on a wide range of factors, including market availability and demand, as well as the difficulty and amount of waste product that comes with cutting any particular shape.

How are diamond cuts evaluated?

Specifics of diamond grading vary depending on the cut, but expert gemologists from organizations like the GIA (Gemological Institute of America) evaluate diamonds based on what are known as the 4Cs: cut, clarity, color and carat.

Are diamond cut and diamond shape the same?

No. Diamond cut refers to how a diamond’s facets are proportioned and arranged, which affects its light performance. Diamond shape refers to the physical outline of the stone, such as round, oval, or emerald.

How do side stones affect the overall style of a ring?

Side stones can impact a ring’s aesthetic and personality in many ways. Well-matched side stones can add refinement and sparkle, and some pairings can make the center stone appear larger.

How do I choose the right diamond cuts for side or accent stones?

Start by considering the shape and cut of your center stone. For example, round center stones pair well with pears or half moons, while square and rectangular center stones often look elegant with clean-lined side stones. Brilliant cut center stones usually match well with brilliant cut accents, and step cut center stones are nicely complemented by step cut side stones. The goal is balance and harmony in the overall design.