Marquise Cut Diamonds: The 2026 Guide to the "Pompadour Smile" Selena Gomez & Bvlgari Made the Year's Most Coveted Shape

When singer Selena Gomez revealed her engagement to producer Benny Blanco in late 2025, the world saw a striking marquise-cut lab grown diamond set on a slim band by Bvlgari. Searches for "marquise cut" exploded overnight, and Gomez's quote — "I always dreamed of a marquise ring" — single-handedly returned this 18th-century shape to the top of the bridal trend charts. In 2026, marquise is no longer a vintage curiosity; it is the most talked-about silhouette in fine jewelry.

What Is a Marquise Cut Diamond? The "Smile of a Marquise"

The marquise cut (also called "navette," meaning "little boat" in French) is a brilliant-cut variation shaped like an elongated oval with two sharply pointed ends. Featuring 58 facets — the same brilliant faceting pattern as a round brilliant — it produces extraordinary fire and scintillation while delivering a uniquely elegant silhouette.

Its origin is pure French royalty. King Louis XV commissioned his court jeweler to create a diamond shaped like the smile of his beloved mistress, the Marquise de Pompadour. The resulting cut was named in her honor — and from that moment, it became a symbol of aristocratic refinement.

Five Reasons Marquise Is Dominating Engagement Rings in 2026

1. The Largest Face-Up Spread of Any Brilliant Cut

Because of its elongated geometry, a marquise diamond appears 15–20% larger face-up than a round brilliant of the same carat weight. A 1.0 ct marquise looks closer to a 1.2 ct round — the "smart luxury" that defines 2026 buying behavior.

2. Lengthens and Slims the Finger

The vertical orientation visually elongates the wearer's finger, making marquise especially flattering for shorter or wider fingers. It is, quite literally, a cut that flatters every hand.

3. Vintage Romance Meets Modern Quiet Luxury

Marquise is one of the rare shapes that bridges 18th-century court elegance and 21st-century minimalism. It works in art deco settings and in pared-back solitaires alike — exactly the dual aesthetic 2026 brides are seeking.

4. The Rise of "East-West" Settings

Rather than the traditional north-south orientation, 2026's most-watched marquise trend places the stone horizontally across the finger — a horizontal sweep of brilliance that feels distinctly modern and architectural. East-West marquise rings dominated bridal editorials throughout early 2026.

5. Pairing With Toi et Moi Designs

A sharp marquise paired with a soft pear or round brilliant creates the celebrated "Toi et Moi" two-stone silhouette — a high-prestige look favored by celebrities and editorials alike. At ADAMAS, custom Toi et Moi consultations in K18 gold with D-color diamonds have risen sharply for the 2026 wedding season.

Three Critical Buying Checks for a Marquise Diamond

① The Golden 2:1 Length-to-Width Ratio

The most universally admired marquise proportion sits between 1.85 and 2.10 length-to-width. Below this, the stone reads as squat and pear-like; above it, as needle-thin. No matter how high the carat weight, a marquise outside this range will not deliver the elegance the cut is famous for.

② Watch for the "Bowtie Effect"

All marquise diamonds exhibit a "bowtie" — a darker bowtie-shaped shadow across the center, caused by light leakage. In a well-cut stone, the bowtie is subtle and animates beautifully when the hand moves. In a poorly cut stone, it dominates the diamond. Always inspect the stone in person, or insist on a GIA-graded high-cut marquise.

③ Protect the Sharp Points

The pointed tips of a marquise are vulnerable to chipping. Settings with V-shaped prongs at both ends are essential. ADAMAS uses precision-crafted V-prongs as standard on every marquise piece, ensuring the longevity of D-color brilliance for generations.

ADAMAS Marquise Jewelry: Where Pompadour's Smile Meets Modern Luxury

Built on a philosophy of "timeless brilliance," ADAMAS pairs the marquise cut with the highest-quality materials available — D-color diamonds set in K18 gold. From solitaire engagement rings and Toi et Moi designs to eternity rings featuring marquise side stones and pendant centerpieces, every piece is hand-finished to honor the shape's 260-year heritage. Explore the collection at adamas-gold.jp.

Conclusion: A Smile That Crosses Centuries

Three centuries after a French king commissioned a diamond shaped like his beloved's smile, Selena Gomez's Bvlgari ring has reawakened the world to the marquise cut. It looks larger than it weighs, lengthens the finger, bridges vintage and modern, and carries one of the most romantic origin stories in all of jewelry. For a first significant diamond, a milestone celebration, or a wedding band of striking individuality, the marquise remains — in 2026 as in 1745 — one of the most poetic choices a wearer can make.

Discover ADAMAS's bespoke marquise jewelry in K18 gold with D-color diamonds at adamas-gold.jp.