3 Carat Blue Lab Grown Diamond Engagement Ring · Oval Cut Three Stone | Constellation
10K Solid Gold / Yellow Gold
$4,400.00
Sale price
$4,400.00
Regular price
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3 Carat Blue Lab Grown Diamond Engagement Ring · Oval Cut Three Stone | Constellation
$4,400.00
Sale price
$4,400.00
Regular price
A 3-carat fancy blue lab grown diamond, oval-cut and flanked by two half-moon accents — handcrafted to order. The Constellation pairs the brilliance of a oval center with a classic three stone setting, in your choice of solid gold or platinum.
- 3ct blue center — Fancy blue lab grown diamond, VS clarity
- Oval cut — elongated silhouette with crushed-ice brilliance
- Side stones: Two half-moon accent diamonds (0.50 ct each, 1.00 ct total)
- Band width: 2.5mm — proportioned for a 3ct center
- IGI® or GIA® certified — independent grading report included
- Your choice of metal: 10K, 14K, 18K solid gold or platinum
- Free worldwide insured shipping + lifetime warranty
Made to order in 1–2 weeks · 30-day returns · Starting at $4400.00
Have questions about this ring?Talk to a real diamond expert — we typically respond within 24 hours.
Contact us →
Full Specifications
| Specification | Detail |
|---|---|
| Center Stone | 3 ct Lab Grown Diamond, Fancy Blue, Oval, VS Clarity, Excellent Cut |
| Center Stone Size | 11x7.5mm · Diamond size guide |
| Setting | Three Stone |
| Side Stones | Two half-moon lab grown diamonds — 0.50 ct each (1.00 ct total, 7x4mm) |
| Total Carat Weight | 4.00 ct (3 ct center + 1.00 ct accents) |
| Band Width | 2.5mm |
| Metal Options | 10K, 14K, 18K Solid Gold, Platinum Pure |
| Metal Colors | Yellow, Rose, White Gold |
| Certification | IGI® or GIA® diamond grading report |
| Production | Handcrafted to order — 1–2 weeks |
| Included | Free insured worldwide shipping, lifetime warranty, 30-day returns |
Why Mohana
For couples who want a real, certified diamond crafted to their exact specifications — without the retail markup of a national chain.
- Made to order, not pulled from inventory — every ring is handcrafted to your stone, finger size, and metal choice over 1–2 weeks. Your ring has never been worn or sat in a display case.
- Direct-from-workshop pricing — you pay for the diamond, the metal, and the craftsmanship. No retail floor, no franchise markup, no middleman.
- Every center stone IGI® or GIA® certified — independent grading report ships with the ring. Verify the specifications directly on the IGI or GIA portal.
- Custom variations welcome — different carat, shape, metal, or setting? Our craft team can quote any reasonable modification before production begins.
- Real human concierge — contact us directly for diamond questions, sizing help, or custom requests. We respond personally — not via bot.
About Blue Lab Grown Diamonds
Blue diamonds are among the most coveted natural gems in history. The 45.52-carat Hope Diamond (Smithsonian, ~$200–250M estimated value), the 14.62-carat Oppenheimer Blue (sold for $57.5M, then the most expensive diamond per carat ever auctioned), and the Wittelsbach-Graff Blue are among the most legendary. Natural fancy blue diamonds typically sell for hundreds of thousands per carat. Lab grown technology now makes blue diamonds accessible without that premium.
Mohana's blue lab grown diamonds are chemically, optically, and physically identical to mined blue diamonds — graded by the same IGI and GIA laboratories. The blue color comes from trace boron in the carbon lattice (the same mechanism as in natural blue diamonds, including the Hope), is part of the diamond's atomic structure, and will never fade.
Blue diamonds pair beautifully with white gold and platinum (cool-on-cool) or with yellow gold for a striking warm/cool contrast. Explore the full blue diamond collection.
Frequently Asked Questions
Are blue lab grown diamonds real diamonds?
Yes. Lab grown blue diamonds are 100% real diamonds — same crystal structure, same hardness (10 on the Mohs scale), same optical brilliance as mined blue diamonds. Every Mohana blue diamond is certified by IGI or GIA.
How many side stones does this ring have?
Two half-moon lab grown diamonds — 0.50 ct each (1.00 ct total, 7x4mm). For exact stone count on your specific configuration, our craft team can confirm before production — contact customer support.
What is the band width of this ring?
The band measures 2.5mm wide — slim enough to wear daily, substantial enough to hold the design securely. The band width is consistent across all metal options.
How much does a 3 carat blue lab grown diamond engagement ring cost?
The Mohana Constellation starts at $4400.00 in 10K solid gold and scales up with 14K, 18K, and platinum.
Can this ring be resized?
Yes — complimentary resizing within the first year. Full eternity bands are the exception due to their continuous diamond setting.
What is a three stone setting?
A three-stone setting flanks the center diamond with two complementary side stones — often symbolizing past, present, and future. The half-moon side stones of the Constellation echo the curve of the oval center for a unified, harmonious silhouette.
What's included with my ring?
The IGI® or GIA® grading report, a signed Mohana certificate of authenticity, free worldwide insured shipping, a lifetime craftsmanship warranty, a 30-day return window, and complimentary resizing within the first year.
How long does it take to make and ship?
Each ring is handcrafted to order in 1–2 weeks, then ships free worldwide with full insurance.
Can I customize this ring?
Yes — contact our team through customer support for a custom variation in a different carat, shape, or metal combination.
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