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Marquise Cut Lab Grown Diamond Solitaire Engagement Ring
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About This Ring
Marquise Cut · Solitaire
Center
Marquise Cut
Carat
1 ct
CustomizableMetal
CustomizableSetting
Solitaire
An independent IGI grading report is included when the selected individual lab-grown center or primary diamond is 0.50 ct or larger.
| Detail | Reference design | Customizable |
|---|---|---|
| Center diamond | Marquise · 12.0 × 6.00 × 4.15 mm · 1.650 ct | 1–4.5 ct |
| Side diamonds | None · 0.00 ct | None |
| Total diamond weight | 1.650 ct · 1 diamond | Varies with selected center |
| Stone type | Lab Grown Diamond | — |
| Setting | Four-Prong Cathedral | Scales with center |
| Band | Plain polished shank | — |
| Finish · Occasion | High Polish · Engagement, Anniversary, Bridal | — |
At a glance
A marquise lab grown diamond solitaire engagement ring from Signora Jewels.
The reference design centers a 1.650 ct marquise measuring 12.0 × 6.00 × 4.15 mm with no side diamonds. Main diamond weight is 1.650 ct, side diamond weight is 0.00 ct, for 1.650 ct total diamond weight.
The CAD shows a 5.60 mm setting height, a 2.00 mm upper band profile and a 1.60 mm lower shank.
The polished shoulders rise into an open cathedral structure beneath the center, keeping the elongated diamond visually separate from the plain band.
Choose a 1 ct, 1.5 ct, 1.65 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct or 4.5 ct center and your preferred metal from the options on this page.
Signora Jewels keeps the 12.0 × 6.00 mm marquise alone at the center, without a halo or side diamonds competing with its length. The photographed setting secures both pointed ends and adds two side contact points, while the polished shoulders rise toward the diamond through an open cathedral profile.
The CAD places the reference head at 5.60 mm high. A 2.00 mm upper profile transitions into a 1.60 mm lower shank, keeping the band visually quiet beside the elongated center. The result is a solitaire where the marquise supplies the complete diamond weight.
Design highlights
- 1.650 ct reference marquise measuring 12.0 × 6.00 × 4.15 mm
- Four-prong setting with protection at both pointed ends
- No side or accent diamonds
- 1.650 ct main diamond + 0.00 ct side diamonds = 1.650 ct total diamond weight
- Open cathedral support beneath the center
- 5.60 mm reference setting height with a plain polished shank
The setting keeps metal away from most of the marquise perimeter while protecting the narrow tips. With no additional stones along the shoulders, the eye follows the center from point to point. Explore more engagement rings, compare elongated cuts in the diamond stone guide, or review the available choices in the metal guide.
Diamond & Ring Details
| Specification | Details |
|---|---|
| Main diamond | Marquise · 12.0 × 6.00 × 4.15 mm · 1.650 ct reference |
| Side diamonds | None · 0.00 ct |
| Total diamond weight | 1.650 ct |
| Stone count | 1 |
| Setting | Four-Prong Cathedral |
| Band | Plain polished shank |
| Setting height | 5.60 mm |
| Upper band profile | 2.00 mm |
| Lower band width | 1.60 mm |
| Center options | 1 ct, 1.5 ct, 1.65 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct |
| Finish | High Polish |
The 1.650 ct center weight is the confirmed listing reference. The CAD supplies the 12.0 × 6.00 × 4.15 mm dimensions; final dimensions and setting proportions vary with the selected center weight.
About Lab Grown Diamonds
The reference marquise measures 12.0 × 6.00 × 4.15 mm and is listed at 1.650 ct. With no accent stones, the center accounts for the complete diamond weight of the ring. The elongated shape puts particular importance on the settings at both pointed ends.
Metal, Care & Fit
The CAD gives an 18K metal weight of 3.60 g. The open cathedral structure leaves access beneath the center for cleaning. Use warm water, mild soap and a soft brush around the underside of the diamond, paying particular attention to the settings protecting both pointed ends.
FAQ
What is the total diamond weight of the 1.650 ct reference ring?
The main marquise weighs 1.650 ct and there are no side diamonds. The reference ring therefore has 1.650 ct total diamond weight.
How are the pointed ends of this marquise protected?
The setting places metal directly over both pointed ends of the marquise. Two additional side contact points support the elongated center while leaving most of its outline visible.
How high does the 1.650 ct reference setting sit?
The CAD shows a 5.60 mm setting height. The shoulders rise into an open cathedral structure beneath the center rather than closing the underside with a solid wall.
How does the plain band affect the way this ring wears?
The lower shank measures approximately 1.60 mm, with a 2.00 mm profile shown nearer the center. With no shoulder diamonds, the band remains smooth and visually separate from the marquise.
How should the marquise setting be cleaned?
Use warm water, mild soap and a soft brush beneath the open center. Check the settings at both pointed ends after a hard impact because those areas protect the narrowest parts of the diamond.