Half-Moon Diamonds: Should You Use Them for Your Jewelry?

You can get easily overwhelmed when searching for the perfect diamond for your jewelry. The sheer variety of cuts and shapes available only makes it a harder decision to make. One such intriguing cut is the half-moon diamond, a unique and elegant cut that can add a touch of sophistication to any piece.🤗

In this article, we'll explore the half-moon diamond, its characteristics, and its use in jewelry, particularly in conjunction with round or oval-shaped diamonds.

Basics: What is a half-moon diamond?

Originating in the 20th century, the half-moon diamond cut is a relatively modern design compared to traditional cuts like the round brilliant or the princess cut. Half-moon diamonds were created as a response to the demand for unique side stones that could beautifully complement a variety of center stones without overpowering them.

Semi Halo Half-Moon Diamond Ring
Image: Marrow Fine

The half-moon diamond, also known as demilune diamond, is a unique shape to its name. This fancy diamond cut resembles the shape of a half-moon or a semi-circle and offers an elegant balance of subtlety and sparkle.

Features of the half-moon cut diamond include:

  • Unusual, semi-circular shape that creates a unique silhouette.😊
  • An elongated look that can help emphasize the center stone in jewelry settings.

The half-moon cut diamond can be either step-cut or brilliant-cut. A step-cut half-moon diamond features parallel lines and geometric facets, emphasizing the diamond's clarity and giving it an understated, sophisticated glow.

👉🏻On the other hand, a brilliant-cut half-moon diamond features a multitude of small facets that maximize light return, thus creating a vibrant, sparkling effect.

Below are a few other aspects for you when considering half-moon diamonds:

  • Versatility - They can be used as standalone pieces in a half-moon diamond ring or a pair of half-moon diamond earrings, creating an elegant yet unconventional aesthetic. Alternatively, they can be used as side stones in rings, where they beautifully complement oval, round, or cushion-cut diamonds, enhancing the overall design.
  • Durability - The two pointed ends of half-moon diamonds make them prone to be chipped when hit by hard surfaces.
  • Cost - The cost of a half-moon diamond varies depending on its size, cut, color, clarity and carat weight. However, since these diamonds are rare and delicate in nature, they can be a bit more costly than some other stones.

Half-moon diamonds are a unique and exquisite choice for jewelry that can help you set yourself apart from the crowd. Their combination of subtlety and sparkle provides an elegant balance of sophistication and glamor that will surely turn heads!  

Half-moon variant: Crescent cut diamonds

An alluring variant of the half-moon diamond is the crescent-cut diamond.🌙

Like the half-moon cut, the crescent-cut diamond features a semi-circular shape. However, it does offer a distinct look due to its rounded-off straight edge, resulting in more pointed ends and deeper curvature.

The delicate and unique appeal of the crescent-cut diamond adds charm to any jewelry piece. Like the half-moon cut, the crescent-cut diamond can be step-cut or brilliant-cut, allowing for flexibility in style and light performance.

Whether used as a standalone gem in a piece of jewelry or as a side stone enhancing a center diamond, crescent-cut diamonds add a more feminine aesthetic appeal. As with half-moon diamonds, they pair beautifully with various center stone shapes, adding depth and interest to the design.

But the crescent-cut diamond's inherent fluidity and grace particularly seamlessly integrate with diamonds with curved edges such as round, oval, pear and marquise, making it a versatile option for intricate jewelry designs.

Their increased curvature compared to half-moon diamonds also provides a pronounced contrast when paired with square or rectangular center stones.

Spotting half-moon diamonds in the fashion circle

Half-moon diamonds, with their unique shape and style, have found a place in the fashion industry, gracing many pieces of celebrity jewelry. Here are a few notable examples of half-moon diamond jewelry:

  • Actress Nene Leakes received a breathtaking engagement ring from Gregg Leakes featuring a massive cushion-cut diamond complemented by two half moons.
  • Canadian singer Avril Lavigne showcased a striking ring with half-moon diamonds. The pear-shaped diamond with half-moon side stones makes for an eye-catching combination that brilliantly enhances the center stone.
  • American singer Mariah Carey's engagement ring has a massive emerald-cut fancy light pink center stone flanked by two half-moon diamonds.

Not just these celebrities have embraced the charm of half-moon diamonds. Various high-end jewelry designers and brands have started incorporating this elegant cut into their collections, marking its growing popularity in fashion.📈

Half-moon cut vs. Other similar diamond cuts

Half-moon cut diamonds stand as a unique choice in the world of diamond cuts with their captivating curves and sharp lines. However, to truly appreciate their beauty and uniqueness, let's compare them with two other unconventional diamond cuts: the trillion and trapezoid.

The trillion cut

The trillion cut is a triangle-shaped diamond with sharp or slightly rounded corners. Its large number of facets creates a brilliant effect, delivering impressive fire and sparkle. Trillion-cut diamonds are typically used as side stones but can also be used as center stones due to their distinct shape and high brilliance.

The trillion cut comparison to half-moon diamonds

Half-moon diamonds, while sharing the aspect of brilliance when cut in the brilliant-cut style, offer a different aesthetic. They boast a unique semi-circular shape with one straight side and one curved side, creating a soft and alluring appeal.

Unlike trillion cuts, half-moon diamonds are primarily used as side stones, often accompanying a larger center stone in a three-stone setting.

Trapezoid cut

Trapezoid cut diamonds, which feature four sides with two parallel and two non-parallel sides, have a blocky and geometric appeal. These cuts are available in both brilliant and step cut styles. Much like half-moons, trapezoid diamonds are commonly used as side stones to enhance the center stone.

Trapezoid diamonds comparison to half-moon diamonds

Contrasting with trapezoids, half-moon cut diamonds can pair more center stones ideally, including shapes with straight lines as well as those with curves. When a half-moon diamond is step-cut, it shares the hall-of-mirrors effect seen in trapezoid diamonds. However, its curved side adds a touch of softness to its geometric aesthetic, offering a combination of elegance and symmetry.

Comparison verdict

The half-moon cut's unique shape allows designers to experiment with different settings and designs.😽 It could be paired with various metals such as gold, platinum, or silver, catering to various personal styles and preferences.

It's also noteworthy that while trapezoid diamonds match well with emerald and other rectangular shaped center stones, half-moon cut diamonds, especially their variant crescent diamonds, pair harmoniously with both round and oval-shaped center stones due to their curved edge(s).

While half-moon, trillion, and trapezoid cut diamonds share the characteristic of being unconventional and distinctive, each has its unique charm and appeal. With its fusion of geometric and curvilinear lines,👏🏻 the half-moon diamond offers a unique design and versatility that is hard to find in other diamond cuts.

Whether it's a half-moon diamond ring, an oval diamond with half-moon side stones, or a round diamond with half-moon side stones, this distinctive cut is a captivating choice for those looking for something truly unique for their jewelry.

Pairing with half-moon diamonds: Diamonds & settings

Half-moon diamonds offer exceptional versatility in their application, pairing beautifully with various diamond shapes and settings. Half-moon diamonds serve as magnificent side stones in three-stone settings, accentuating the center diamond whether it is round, oval, or a rectangle/square cut.

In the case of a round or oval center stone, the curved side of the half-moon diamond sits flush against the center stone, adding to the harmony and elegance of the design. Crescent-cut diamonds can also be used, nestling closer to the center diamond due to their pointed ends and deeper curvature.

Furthermore, half-moon diamonds also lend themselves well to unique designer settings, such as the bezel setting, where the diamond is surrounded by a thin metal rim. This setting protects the diamond and adds a modern, sleek aesthetic to the jewelry piece.

This setting offers protection and enhances the diamond's visibility, making it a prominent feature of the piece. Prong and pave settings could also work wonderfully with half-moon diamonds, each adding a distinct flair to the final piece.


Half-moon diamonds, with their distinctive shape and undeniable charm, make a unique and stylish choice for your jewelry. Whether used as standalone gems in half-moon diamond earrings or as side stones in a cushion-cut diamond ring with half-moon side stones, these diamonds lend an aura of sophistication and elegance.

Remember, your diamond cut and setting choice ultimately depends on your style and the statement you wish to make with your jewelry. Therefore, if you're seeking something that stands out from the norm and offers a touch of uniqueness, a half-moon diamond might be a perfect fit for you, though you may spend some time to find one since their supply is not that sufficient.

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