Unii Jewels
4.00CT Marquise Cut Lab Grown Diamond Vintage Solitaire Engagement Ring | IGI Certified
Round Brilliant Lab Grown Diamond Solitaire Stud Earrings – IGI Certified | Unii Jewels on orders over $3,000
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Description
A dramatic elongated silhouette meets timeless vintage character in the Unii Jewels 4.00ct Marquise Lab Grown Diamond Vintage Solitaire Engagement Ring.
At the heart of this design is a substantial 4.00ct Marquise Lab Grown Diamond, offered in the supplied D-E-F color and VVS-VS clarity ranges, with an Excellent cut specification and IGI certification.
With the complete 4.00CT diamond weight concentrated in a single Marquise centerpiece, the ring preserves the clarity of a true solitaire composition. There are no supplied side diamonds competing for attention—the center stone carries the entire diamond presence, while the vintage styling gives the surrounding ring its decorative identity.
💎 Diamond Details
Total Diamond Weight: 4.00CT
Diamond Type: Lab Grown Diamond
Diamond Shape: Marquise
Carat Weight: 4.00CT
Diamond Color: D-E-F
Diamond Clarity: VVS-VS
Cut: Excellent
Certification: IGI Certified
💍 Ring Details
Style / Design: Vintage
Product Type: Vintage Solitaire Engagement Ring
Band Width: 2mm
Metal Options: Silver, Gold, Platinum
The Design Story — A Statement Marquise in a Vintage Solitaire
From a jewelry designer's perspective, a 4.00ct Marquise already possesses enough scale and geometric character to define an entire ring.
The shape creates a powerful vertical axis.
Its fuller center produces substantial visual presence, while the two tapered points extend that presence lengthwise. This gives the diamond a distinctly elongated silhouette rather than the more compact outline associated with Round or square-shaped center stones.
For a vintage solitaire, that geometry provides an ideal centerpiece because the surrounding metal design can introduce decorative character without needing additional diamonds.
Why 4.00ct Changes the Visual Balance
At this scale, the center stone is not simply one component of the design—it becomes its dominant architectural element.
Because the full 4.00CT total diamond weight belongs to the Marquise center, the hierarchy is exceptionally straightforward:
4.00ct Marquise Center → Vintage Ring Architecture → Refined 2mm Band
There is no division of diamond weight between a center and smaller accents.
That allows the eye to recognize the Marquise silhouette immediately and keeps the solitaire identity exceptionally strong.
The Power of Marquise Geometry
The Marquise shape combines several characteristics within one outline.
Its pointed tips establish direction.
Its curved sides introduce softness.
Its elongated proportions create length.
Its symmetrical north-south orientation provides balance.
These characteristics make the Marquise particularly effective when a ring is intended to feel dramatic without relying on a Halo or multiple large side stones.
The stone's outline itself becomes the visual statement.
Vintage Character Without Losing the Solitaire Identity
A vintage solitaire offers a different approach from a minimalist modern solitaire.
Instead of making every surrounding element visually disappear, vintage styling allows the metalwork and architecture of the ring to contribute additional personality.
The important distinction is hierarchy.
Decorative vintage character should support the centerpiece rather than compete with it.
With a 4.00ct Marquise, that hierarchy is naturally strong: the diamond provides scale and brilliance, while the vintage design provides detail and atmosphere.
Why the 2mm Band Works
The supplied 2mm width creates an intentional contrast against such a substantial center diamond.
A much heavier band could visually reduce the difference between the center stone and the supporting structure.
A refined 2mm foundation instead emphasizes the scale of the 4.00ct Marquise.
The visual progression becomes:
Refined 2mm Band → Vintage Design Details → Dramatic 4.00ct Marquise
This allows the center diamond to remain visually dominant from virtually every viewing angle.
Why Choose This 4ct Vintage Marquise Design?
This design is particularly suited to someone who wants a large Marquise centerpiece but prefers more character than a completely minimalist solitaire.
The appeal comes from the combination of two different design ideas.
The solitaire structure keeps the diamond hierarchy clean and unmistakable.
The vintage styling gives the ring a more decorative and distinctive personality.
Because there are no supplied side diamonds, nothing interrupts the recognizable outline of the 4.00ct Marquise. Its pointed tips, elongated proportions and substantial scale remain fully central to the design.
At the same time, the vintage concept prevents the ring from feeling visually generic.
The result is a statement 4.00ct Vintage Solitaire Engagement Ring where the elongated Marquise Lab Grown Diamond provides the drama, while the refined 2mm foundation and vintage-inspired design language provide the character.
Free Shipping & Returns
🔄 30-day return and refund policy for peace of mind
✅ Fully insured and tracked shipping via UPS & USPS
⏱️ Handcrafted with care,9-10 days production time🌍 Worldwide delivery in 8-10 business daysafter production
Please read the Shipping Policy for more information.
Why Choose Lab Diamonds?
✓ Ethical & Conflict-Free – Grown in labs with zero mining impact
✓ IGI Certified Quality – Independently verified for clarity, color, and carat
✓ No BGM Stones – Guaranteed no brown, green, or milky undertones
✓ Eco-Friendly Luxury – Timeless beauty, sustainably made
✓ Ideal for Custom Jewelry – Engagement rings, wedding bands, and more
Why Unii Jewels?
🌟Surat-Made Brilliance– Crafted in India’s diamond hub
💎Certified Sparkle– IGI-certified lab-grown diamonds
💸Unmatched Value– Low prices Diamond + low making charges
🖌️Truly Custom– Unique designs tailored for you
📦Worldwide Shipping– Fast, Free, insured, and reliable
Ring Size Chart
Ring Size Conversion Chart
Determining your ring size can be tricky without the proper tools. Use our Ring Size Conversion chart below to find your ring size in different countries. Need help? Speak with a Diamond Expert now by WhatsApp +91 7359257266
| Ring Diameter (MM) | USA/Canada | United Kingdom | France | Germany | Japan | Switzerland |
|---|---|---|---|---|---|---|
| 14.0 mm. | 3 | F | 44 | 14 | 4 | 4 |
| 14.4 mm. | 3½ | G | 45¼ | 14½ | 5½ | 6⅓ |
| 14.8 mm. | 4 | H½ | 46½ | 15 | 7 | 6½ |
| 15.2 mm. | 4½ | I½ | 47¾ | 15¼ | 8 | 8 |
| 15.6 mm. | 5 | J½ | 49 | 15¾ | 9 | 9½ |
| 16.0 mm. | 5½ | L | 50¾ | 16 | 10½ | 10¾ |
| 16.5 mm. | 6 | M | 51½ | 16½ | 12 | 12¾ |
| 16.9 mm. | 6½ | N | 52¾ | 17 | 13 | 14 |
| 17.3 mm. | 7 | O | 54 | 17¼ | 14 | 15¼ |
| 17.7 mm. | 7½ | P | 55¼ | 17¾ | 15 | 16½ |
| 18.2 mm. | 8 | Q | 56¾ | 18 | 16 | 17¾ |
| 18.6 mm. | 8½ | Q½ | 58 | 18½ | 17 | 18½ |
| 19.0 mm. | 9 | R½ | 59¼ | 19 | 18 | 20 |
| 19.4 mm. | 9½ | S½ | 60¾ | 19½ | 19 | 21 |
| 19.8 mm. | 10 | T½ | 61¾ | 20 | 20 | 21¾ |
| 20.2 mm. | 10½ | U½ | 62¾ | 20¼ | 22 | 22¾ |
| 20.6 mm. | 11 | V½ | 64¼ | 20¾ | 23 | 24 |
| 21.0 mm. | 11½ | W½ | 66 | 21 | 24 | 25¾ |
| 21.4 mm. | 12 | Y | 67¼ | 21¼ | 25 | 27½ |
| 21.8 mm. | 12½ | Z | 68 | 21¾ | 26 | 28¾ |
| 22.2 mm. | 13 | Z + 1 | 69 | 22 | 27 | 29¼ |
| 22.6 mm. | 13½ | Z + 1.5 | 71 | 22.6 | - | 31 |
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Great company the pictures does no…
Great company the pictures does no justice for how magnificent the ring actually looks in person. My fiancée loves it and get compliments on her ring every time
I asked for a custom band after I…
I asked for a custom band after I ordered and my personal contact which was assigned to me and proactively reached out handled it for a very small cost. I couldn't be happier. Also...She said YES!
Great customer service & Beautiful ring
I initially had an issue with receiving a ring that did not match the expected specifications, but their team, especially Paul & Mary, worked with me directly to resolve everything in a fair and professional manner.
Amazing experience
The customer service I received from Lisa was amazing. She was helpful, patient and a pleasure to work with.
Gorgeous Ring
The ring is more beautiful than the picture. I couldn't be happier with it.
Ordered anniversary ring 02/18
While there were multiple delays and missed shipping dates, Paul made the corrections and the ring came today. Most importantly the wife loves it.
Recommend & will consider purchasing again
This is my second order from this company. I originally had a not so pleasant experience with the order arriving outside of the delivery frame. Paul and Adam were super helpful and ended up giving me a resolution that I was happy with.
I love my ring
I love my ring! I was hesitant to order a diamond ring online but I was not disappointed when it came in! It's so pretty and the price was unbeatable.
I had an excellent experience with Best…
I had an excellent experience and especially with Adam, who made the entire process feel incredibly personal from start to finish.
Great people and Service
Great people, my wife decided she did not like the initial ring she got for Christmas so we had to swap out for a different design and ring size. Samantha and Paul were amazing in walking me through the process.
I had an absolutely amazing experience…
I had an absolutely amazing experience from start to finish. They truly went above and beyond in helping me choose the perfect engagement ring and wedding band.
My ring is beautiful and it arrived…
My ring is beautiful and it arrived earlier than expected. Definitely recommend.
After 11 years and our second daughter, I finally have my dream ring.
I've worn a ring for 11 years that never truly felt like mine. After our second daughter was born, my husband and I decided it was time to finally get it right.
my wife to be loves her ring
my wife to be loves her ring. she stares and takes pictures of it all day, everyday. couldn't be happier
Their diamonds is outstanding, I highly recommend
After extensive research, I chose to purchase from them and couldn't be happier with my decision. The quality of their diamonds is outstanding.
Amazing experience
Amazing experience! Customer service is superb, and the ring is perfectly made with top quality diamond and craftsmanship.
A M A Z I N G
I wanted to purchase a lab grown diamond because after all the researching, more bang for the buck! But, I was very skeptical about online purchases for a diamond ring.
Amazing as advertised perhaps better.
Amazing as advertised perhaps better.
Had the best experience working with…
Had the best experience working with Julieanne and her team. Julieanne was great to work with and the speed, quality and customer service was above and beyond.
Mary
Mary, and a couple of other associates were phenomenal. Mary took the time to find just the right ring for my wife.