The 1 carat marquise cut is one of the most dramatic and visually impressive diamond choices available — combining the world's most popular carat weight with an extraordinary elongated silhouette that delivers the largest face-up appearance of any diamond shape. At Variation, explore our certified collection of 1 carat marquise cut lab grown diamonds, IGI certified, conflict-free, and priced up to 80% less than natural diamonds.
About 1 Carat Marquise Cut Lab Grown Diamonds
The 1 carat marquise cut lab grown diamond is one of the most dramatic and visually striking diamond combinations available — pairing the world's most popular carat weight with an extraordinary elongated silhouette that delivers the largest face-up appearance of any diamond shape per carat weight. Regal, bold, and utterly distinctive, the 1 carat marquise cut delivers maximum visual impact at the most popular and accessible price point in the diamond world. At Variation, our IGI certified 1 carat marquise cut lab grown diamonds are available in D to F color and VVS1 to VS2 clarity — priced up to 80% less than an equivalent natural diamond.
Why Choose a 1 Carat Marquise Cut Lab Grown Diamond?
The marquise cut delivers more face-up size per carat than any other diamond shape — and at 1 carat, this advantage is immediately and dramatically visible. A 1 carat marquise cut measures approximately 10.0 x 5.0mm — nearly 55% longer than a 1 carat round brilliant of the same weight — creating an extraordinary elongated presence that spans the finger dramatically and creates the illusion of a significantly larger stone. For buyers seeking maximum visual impact at the 1 carat price point, the marquise cut is the undisputed champion.
- 56 to 58 facets — delivering exceptional fire and brilliance across the elongated form
- 10.0 x 5.0mm face-up size — the largest face-up appearance at 1 carat
- Two pointed ends — creating a dramatic, elongating finger presence
- IGI certified — every stone independently graded and verified
- D, E and F color — the three highest color grades available
- VVS1 to VS2 clarity — all eye-clean, all exceptional quality
- Up to 80% less than an equivalent natural marquise cut diamond
How Big Is a 1 Carat Marquise Cut Lab Grown Diamond?
A 1 carat marquise cut diamond measures approximately 10.0 x 5.0mm face-up — making it the largest facing diamond shape at this carat weight. This extraordinary elongated form spans the finger dramatically — creating the appearance of a stone significantly larger than its 1 carat weight would suggest and making it the ideal choice for buyers who want maximum visual presence at the most popular and accessible price point.
Compared to a 1 carat round brilliant at 6.5mm diameter, the marquise cut at 10.0mm length appears dramatically larger face-up — nearly 55% longer — while weighing exactly the same. This remarkable size advantage makes the 1 carat marquise cut one of the most compelling and outstanding value choices in the entire lab grown diamond collection at Variation.
How to Choose the Best 1 Carat Marquise Cut Lab Grown Diamond
Choose the Right Length-to-Width Ratio
The length-to-width ratio defines the overall proportion and drama of your 1 carat marquise cut diamond. A ratio of 1.85–2.10 is considered the most classic and universally flattering marquise shape at 1 carat. Below 1.75 appears wider and less dramatic; above 2.25 appears very elongated and narrow. For a 1 carat marquise cut, a ratio of 1.90–2.00 delivers the most balanced combination of dramatic elongation and visual impact.
Watch for the Bowtie Effect
Marquise cut diamonds almost always display a bowtie — a dark shadow across the center of the stone caused by light leakage. A slight bowtie is normal and acceptable at 1 carat; a prominent bowtie significantly reduces brilliance and detracts from the stone's dramatic beauty. Always view the stone in high-resolution video before purchasing to assess bowtie visibility — a well-cut 1 carat marquise will have a minimal, barely perceptible bowtie that does not detract from its extraordinary appearance.
Check Point Symmetry
Perfect symmetry between the two pointed ends is critical for a marquise cut diamond at any carat weight. Both points must align precisely along the stone's central axis — any deviation creates an unbalanced appearance that is immediately visible when the stone is set. Always choose Excellent symmetry grades for a 1 carat marquise cut and view the stone face-up before purchasing to verify perfect point alignment.
Why Buy 1 Carat Marquise Cut Lab Grown Diamonds from Variation?
At Variation, we specialize exclusively in lab grown diamonds — and our 1 carat marquise cut collection reflects our commitment to quality, ethics, and exceptional value.
- IGI certified — every stone comes with a full IGI grading report
- Excellent symmetry — perfectly aligned points and balanced proportions
- D, E and F color only — the highest color grades available
- VVS1 to VS2 clarity — all eye-clean, all exceptional quality
- Conflict-free & ethically sourced — always
- Priced up to 80% less than equivalent natural diamonds
Explore Other Sizes in Marquise Cut Lab Grown Diamonds
Not sure about 1 carat? Explore our marquise cut lab grown diamonds in other carat weights — all IGI certified, conflict-free, and priced up to 80% less than natural diamonds.
Explore Other Shapes in 1 Carat Lab Grown Diamonds
Not sure about marquise cut? Explore our 1 carat lab grown diamonds in other shapes — each with its own unique character, brilliance, and appeal.
- 1 Carat Round Cut
- 1 Carat Oval Cut
- 1 Carat Cushion Cut
- 1 Carat Emerald Cut
- 1 Carat Princess Cut
- 1 Carat Pear Cut
- 1 Carat Radiant Cut
- 1 Carat Heart Cut
- 1 Carat Portuguese Cut
- 1 Carat Ashoka Cut
- 1 Carat Trillion Cut
- 1 Carat Hexagon Cut
Frequently Asked Questions
How big is a 1 carat marquise cut lab grown diamond?
A 1 carat marquise cut diamond measures approximately 10.0 x 5.0mm face-up — the largest face-up appearance of any diamond shape at 1 carat. This extraordinary elongated form appears dramatically larger than a round brilliant of the same weight — making it the ideal choice for buyers seeking maximum visual presence at the 1 carat price point.
What is the bowtie effect in a 1 carat marquise cut diamond?
The bowtie effect is a dark shadow that appears across the center of a marquise cut diamond caused by light leakage. A slight bowtie is normal and acceptable at 1 carat; a prominent bowtie reduces brilliance significantly. Always view the stone in high-resolution video before purchasing to assess bowtie visibility — a well-cut 1 carat marquise will have a minimal bowtie that does not detract from its extraordinary appearance.
Is a 1 carat marquise cut lab grown diamond good for an engagement ring?
Yes — a 1 carat marquise cut engagement ring is one of the most dramatic and distinctive choices available. Its extraordinary elongated presence, maximum face-up size, and regal character make it an unforgettable statement for the most important purchase of your life. At up to 80% less than a natural diamond of the same quality, a 1 carat IGI certified lab grown marquise cut offers extraordinary value and visual impact.
What is the best length-to-width ratio for a 1 carat marquise cut diamond?
A length-to-width ratio of 1.90–2.00 is considered the most balanced and universally flattering marquise proportion at 1 carat — delivering the perfect combination of dramatic elongation and visual impact. Below 1.75 appears wider and less distinctive; above 2.25 appears very elongated and narrow.
What color grade should I choose for a 1 carat marquise cut lab grown diamond?
Marquise cuts concentrate color at their two pointed ends more than round diamonds — making color slightly more visible in this shape. For white gold or platinum settings, D–F color is recommended. For yellow or rose gold settings, G–H color delivers a beautiful result at a more accessible price point. All diamonds at Variation are available in D, E and F color grades.
Explore our full collection of 1 carat marquise cut lab grown diamonds above and find the stone that speaks to you. Questions? Our diamond experts are here to help.