JNCY 2 ctw Marquise Lab Diamond Solitaire Engagement Ring Review
Six prongs hold a marquise-shaped lab-grown diamond of 2.00 ct on this solitaire, which comes in 14k white, yellow or rose gold at $2,750. It suits someone who wants a marquise shape with an excellent cut grade and IGI listed.
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Our verdict
Suited to someone who wants a marquise-shaped 2 ctw diamond with an excellent cut grade and IGI named, at $2,750. Look elsewhere if you want every figure in the listing to agree, because the ring information says 1.00 for total carat weight while the diamond details and title say 2.00. That mismatch is the main caveat.
- Best for
- Someone who wants a marquise-shaped 2 ctw solitaire with a stated cut grade and IGI named.
- Skip if
- You want every carat figure in the listing to agree or need stone dimensions stated.
Why 3.9/5: Lifted by a full spec sheet that includes a cut grade and by a certified diamond stated in the title; held back by a total carat weight that disagrees between the ring information and the diamond details.
Marquise is the shape of the single lab-grown diamond in this JNCY solitaire, which the listing gives as 2.00 ct with colorless (D-E) color, VS2+ clarity and an excellent cut. Six prongs hold it on a 1.8 mm band in 14k white, yellow or rose gold, across sizes 4 to 10. All 75 variants cost $2,750, and the diamond details name IGI.
Specifications
| Spec | Listing says |
|---|---|
| Metal type and color | 14k White Gold |
| Total Carat Weight | 1.00 |
| Rhodium Plated | White Gold Only |
| Average Width (mm) | 1.8 |
| Weight (grams) | 4.4 |
| Diamond Stone Type | Diamond |
| Diamond Creation Method | Lab-grown diamond |
| Diamond Shape | Marquise |
| Diamond Color | Colorless (D-E) |
| Diamond Color Hue | White |
| Diamond Clarity | VS2+ |
| Diamond Cut | Excellent |
| Diamond Certification | IGI |
| Diamond Count | 1 |
| Diamond Carat Weight | 2.00 |
Options and pricing
Three 14k metals are listed, white, yellow and rose gold, each in 25 sizes from 4 to 10, and all 75 variants cost $2,750. White gold carries a rhodium plating line; the other two metals do not. The weight is 4.4 g, with no metal named. One line of the ring information gives a total carat weight of 1.00, while the diamond details give 2.00 and the title says 2 ctw.
How it compares
The 2 ctw Princess Lab Grown Certified Diamond Solitaire Engagement Ring lists the same $2,750 with a princess stone instead of a marquise, and the 2 ctw Oval Lab Grown Diamond Wide Band Solitaire Engagement Ring lists $2,900 with a 2.8 mm average width against 1.8 mm here.
Shipping, returns and warranty
JNCY ships by USPS at no cost and says in-stock items such as this one go out within one to four business days (FedEx 2Day is $25 on US orders). A signature is required on engagement rings, made-to-order designs and orders over $1,500. It also ships to Australia, Canada, France, Germany, Ireland, Italy, South Korea and the United Kingdom for a flat $50, with duties and taxes paid by the buyer. Returns: 30 days from the ship date for pre-designed styles returned unworn with their original documents, with a free FedEx label on US orders; the FAQ page says 7 days instead, so confirm before relying on 30. Warranty: free lifetime repair or replacement of manufacturing defects, one free resizing in the first year for standard ring sizes 4 to 10 (not eternity bands) and two free cleaning visits; wear and tear, lost stones and clearance items are excluded.
Before you buy
JNCY Jewelers is a Miami jeweler whose domain was registered in 2020. Independent feedback is thin: a ProvenExpert page lists three ratings, all 5.00, from Facebook and The Knot with no review text, and searches on 19 October 2026 found no Trustpilot or BBB page for the store. JNCY's own pages disagree in places: the refund window is 30 days on the Refund policy page and 7 days in the FAQ, and the custom-bridal page says it offers no financing while the financing page lists several plans. The listing mentions a diamond certificate; check the report number against the listing when the piece arrives and keep the paperwork, because JNCY charges $100 for a missing one on returns. Payments accepted include major cards, Affirm, Shop Pay and PayPal.
What we liked
- A marquise-shaped 2.00 ct diamond with colorless (D-E) color, VS2+ clarity and an excellent cut listed
- Certification is covered twice: the title says certified and the details name IGI
- Six prongs, a 1.8 mm average width and a 4.4 g weight are stated
- One price of $2,750 covers 3 metals and 25 sizes
Worth noting
- The ring information gives a total carat weight of 1.00, which conflicts with the 2.00 ct in the diamond details and the 2 ctw in the title
- No report number is shown with the IGI mention
- No stone dimensions in millimeters are listed, so the marquise's length and width are not stated
- The 4.4 g weight is not matched to a metal
Questions before you buy
What diamond is in the 2 ctw marquise solitaire?
One marquise lab-grown diamond of 2.00 ct, colorless (D-E), white hue, clarity VS2+, excellent cut, with IGI named as the certification.
Why does the marquise listing show both 1.00 and 2.00 for carat weight?
The ring information gives a total carat weight of 1.00, while the diamond details give a carat weight and total of 2.00 and the title says 2 ctw, with no explanation of why they differ.
Which metals and sizes does the marquise solitaire come in?
14k white, yellow and rose gold, sizes 4 to 10, with all 75 variants at $2,750, and the rhodium plating line is limited to white gold.
Can I return it if I change my mind?
JNCY's Refund policy page gives 30 days from the ship date for pre-designed styles returned unworn with their original documents; US orders get a free FedEx label and international buyers pay return shipping. A missing diamond certificate costs $100. The FAQ page says refunds are possible for up to 7 days after delivery, so confirm the window before relying on 30 days.
How long until it ships?
JNCY says in-stock items ship within one to four business days by USPS at no cost, and FedEx 2Day costs $25 on US orders. Signature is required on engagement rings and orders over $1,500.
Does JNCY resize rings?
The warranty page offers one complimentary resizing within a year of purchase for standard ring styles in sizes 4 to 10, up or down one size, except eternity bands; larger changes may cost extra, and rings resized by another jeweler lose the warranty.
Are lab-grown diamonds real diamonds?
GIA says laboratory-grown diamonds have the same crystal structure as natural diamonds, tightly bonded carbon atoms, and nearly the same chemical, optical and physical properties. By eye the difference can be indistinguishable, but gemological laboratories can detect the different growth history with advanced instruments. They are grown by high-pressure high-temperature (HPHT) or chemical vapor deposition (CVD).
Sources & verification
What this review is based on and the day we last read it. Specs and claims from the maker are the maker’s own; the verdict and the rating are ours.
From the store
- 2 ctw Marquise Lab Grown Certified Diamond Solitaire Engagement Ring product page: specs, options and priceSpecs, options and the listed priceRead October 19, 2026
- JNCY Jewelers shipping policyFree USPS shipping, processing times, signature rules, international countries and flat feeRead October 19, 2026
- JNCY Jewelers refund policy30-day returns for pre-designed styles, final-sale and custom items, certificate feeRead October 19, 2026
- JNCY Jewelers warranty pageLifetime manufacturing warranty, free resizing and cleaning in year one, exclusionsRead October 19, 2026
- JNCY Jewelers FAQReturn wording (7 days), payment methods, care tips, international termsRead October 19, 2026
Independent
- ProvenExpert page for JNCY JewelersThree ratings, all 5.00 (two on Facebook, one on The Knot), no review textRead October 19, 2026
- GIA: simulants, moissanite and laboratory-grown diamondsLab-grown diamonds share the crystal structure and nearly the same properties as natural diamondsRead October 19, 2026
What we couldn’t verify
- The ring information lists a total carat weight of 1.00, while the diamond details and the title say 2.00 and 2 ctw.
- The 4.4 g weight is listed without saying which metal it applies to.
- IGI is named, but no report number or stone dimensions are given.
- Independent testing or appraisal: we found none for this piece; the only outside feedback is a ProvenExpert page with three 5.00 ratings (two Facebook, one The Knot) and no text.
- JNCY's pages disagree on the refund window (30 days on the Refund policy page, 7 days in the FAQ).
- We have not seen this piece's diamond certificate; the grades come from the listing.
Spotted an error or something out of date? Tell us and we’ll fix it and update the date.
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