3.06ct Marquise Diamond Engagement Ring — 6-Prong Solitaire, Hidden Halo | 14kt Yellow Gold

3.06ct Marquise Diamond Engagement Ring | Hidden Halo Solitaire | 14kt Yellow Gold

A commanding marquise diamond engagement ring built around a 3.06 carat lab-created marquise diamond in F color and VS1 clarity — one of the most elongating and dramatic diamond shapes available. Set in a 6-prong solitaire with a hidden halo of 0.20tcw round diamonds in 14kt yellow gold. Total carat weight: 3.26tcw. SKU: AJENG-0004. $3,500.

Ring at a Glance

• Center Stone: Lab-Created Marquise Diamond — 3.06ct
• Diamond Color: F (Colorless)
• Diamond Clarity: VS1
• Accent Stones: Round Lab Diamonds — 0.20tcw (Hidden Halo)
• Total Carat Weight: 3.26tcw
• Metal: 14kt Yellow Gold (585 purity)
• Setting: 6-Prong Solitaire + Hidden Halo
• SKU: AJENG-0004
• Price: $3,500

The Marquise Diamond — The Most Elongating Cut in Fine Jewelry

The marquise diamond is the most dramatically finger-lengthening shape in fine jewelry — its pointed ends and curved sides create a silhouette that extends across the finger like no other cut. At 3.06 carats, this marquise diamond delivers extraordinary face-up size: the elongated form distributes carat weight across a larger surface area than a round or cushion of identical weight, making this stone appear significantly larger than its carat designation suggests. F color places this diamond at the very top of the colorless range — two grades above the industry “near-colorless” threshold — ensuring the stone faces up with exceptional brilliance and no visible warmth even in a yellow gold setting. VS1 clarity means inclusions are detectable only under professional 10x magnification, never to the naked eye. The result is a marquise diamond that performs at the highest levels of color and clarity while delivering maximum visual impact.

Stone Details — F Color, VS1, Lab-Created

Lab-created diamonds are chemically, physically, and optically identical to mined diamonds — grown in controlled environments using the same crystalline carbon structure that forms over millions of years underground. They carry the same hardness (10 on the Mohs scale), the same brilliance, fire, and scintillation, and are graded by the same GIA and IGI standards as mined stones. Choosing a lab-created marquise diamond at F/VS1 means accessing top-tier quality grades at a price point that would require significant compromise if purchasing a mined equivalent. The 0.20tcw round diamond hidden halo adds a ring of brilliant accents beneath the marquise center stone — invisible from the top view, revealed from the side with continuous sparkle that a solitaire alone cannot produce.

The 6-Prong Solitaire Setting

The 6-prong solitaire is the traditional setting choice for a marquise diamond, and for good reason: six prongs provide secure coverage of both pointed tips — the most vulnerable parts of the marquise silhouette — while maximizing light entry through the sides and base of the stone. The prongs hold the diamond elevated above the band, allowing light to enter from all directions and producing the full brilliance of which the marquise cut is capable. In 14kt yellow gold, the warm setting tone creates a striking contrast against the icy F-color diamond, making the colorless stone appear even more brilliant by comparison. The hidden halo beneath adds a secret dimension of sparkle that the 6-prong setting preserves above — clean solitaire silhouette on top, hidden brilliance below.

✦ Why Shop With Treasured & Co.

• ✔ Lab-created marquise diamond — F color, VS1 clarity
• ✔ 3.06ct center — extraordinary face-up size with marquise elongation
• ✔ 6-prong setting — maximum security for both pointed tips
• ✔ Hidden halo — 0.20tcw round diamonds, sparkle from every angle
• ✔ Sizes 5–9 available — contact us for custom sizing
• ✔ Free shipping on all orders
• ✔ Financing from $219/mo through Affirm
• ✔ In-store viewing: 30-06 Steinway St, Astoria, NY 11103
• ✔ Call us: (718) 956-0001

What Is a Marquise Diamond?

The marquise diamond — also called the navette cut — is a modified brilliant cut featuring two pointed ends connected by curved sides, producing an elongated oval-like outline. It was commissioned by King Louis XV of France in the 18th century to replicate the shape of the Marquise de Pompadour’s smile, and has remained one of the most distinctive and recognizable diamond shapes in fine jewelry ever since. The marquise cut produces strong brilliance from its 56 to 58 facets and is particularly known for its elongating effect on the finger — making it the preferred choice for buyers who want maximum visual presence and a ring that photographs dramatically from every angle. At 3 carats and above, the marquise cut creates an undeniable statement that few other fancy shapes can match.

Specifications

Center Stone:

Lab-Grown Diamond

Carat Weight (Center):

3.06 ct

Total Carat Weight:

0.20 tcw

Cut:

Marquise

Color:

F

Clarity:

VS1

Treatment:

Lab-Grown

Metal:

14Kt Yellow Gold

Style:

Hidden Halo & Solitaire

About This Ring

Lab-grown diamonds offer the same physical and optical properties as natural — same hardness, same fire, same brilliance — at a price point that makes a larger center stone accessible.

The hidden halo sits below the center stone — invisible from above, but adding fire and a subtle luxury detail when the ring catches light from the side.

What's Included

• A Treasured & Co. certificate of authenticity
• Hand-finished presentation box
• Free insured 2-day FedEx or USPS Priority shipping (US domestic)
• Complimentary first resizing within 60 days of delivery
• 30-day return window — full refund, no restocking fee
• Lifetime craftsmanship guarantee

Browse more unique engagement rings in our collection, or contact our specialist for sizing, viewing, or custom design questions.