Round Cut Lab Grown Diamond Engagement Rings

The most popular diamond cut for a reason—our round brilliant cut lab grown diamond rings deliver maximum sparkle and fire. Whether for an engagement or a special occasion, these timeless pieces radiate unmatched brilliance.

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Nectar Round Pear Floating Toi et Moi Lab Grown Diamond Ring in yellow gold with 2 carat round and pear-shaped diamonds on a twisted band. Nectar Round Pear Floating Toi et Moi Lab Grown Diamond Ring

Nectar Round Pear Floating Toi et Moi Lab Grown Diamond Ring

$18,756.00 $23,444.00
Metal
10K 10K 14K 14K 18K 18K PT
Total Carat
3.0
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Aura Round Hidden Halo Solitaire Lab Diamond Ring in yellow gold with 3 carat round-cut center stone and subtle diamond halo setting. Side view of Aura Round Hidden Halo Solitaire Lab Diamond Ring in yellow gold showcasing elevated prong setting and hidden halo detail.

Aura Round Hidden Halo Solitaire Lab Grown Diamond Ring

$9,767.05 $13,021.00
Metal
10K 10K 14K 14K 18K 18K PT
Total Carat
1.06 1.56 2.06 2.56 3.06 4.06
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June Round Classic Solitaire Diamond Ring in yellow gold with a 2 carat lab grown round diamond, featuring a secure four-prong setting. 2 Carat June Round Classic Solitaire Diamond Ring worn on hand, showcasing its elegant yellow gold band and timeless round diamond cut.

June Round Classic Solitaire Lab Grown Diamond Ring

$8,087.00 $10,782.00
Metal
10K 10K 14K 14K 18K 18K PT
Total Carat
1.0 1.5 2.0 2.5 3.0 4.0
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Crest Round Pear Toi et Moi Lab Diamond Engagement Ring in yellow gold with 2 carat round bezel-set and pear prong-set lab-grown diamonds. Model wearing Crest Round Pear Toi et Moi Lab Diamond Engagement Ring, showcasing 2 carat lab-grown diamonds in a unique dual-stone gold setting.

Crest Round Pear Toi et Moi Lab Grown Diamond Ring

$15,924.00 $19,904.00
Metal
10K 10K 14K 14K 18K 18K PT
Total Carat
2.5 4.5
Save 33%
Cora Round Cathedral Pavé Solitaire Diamond Ring in yellow gold with 2 carat lab-grown round diamond and pavé band, ideal for engagement. Model wearing the Cora Round Cathedral Pavé Solitaire Diamond Ring, showcasing its 2 carat round diamond and elegant pavé setting on finger.

Cora Round Cathedral Pavé Solitaire Lab Grown Diamond Ring

$12,319.00 $18,387.00
Metal
10K 10K 14K 14K 18K 18K PT
Total Carat
1.5 2.0 2.5 3.5 4.5
Save 30%
Bianca Round Ribbed Band Solitaire Lab Grown Diamond Ring Bianca Round Ribbed Band Solitaire Lab Grown Diamond Ring

Bianca Round Ribbed Band Solitaire Lab Grown Diamond Ring

$7,668.00 $10,953.00
Metal
10K 10K 14K 14K 18K 18K PT
Total Carat
1.0 1.5 2.0 2.5 3.0 4.0

Round Cut Lab-Grown Diamond Engagement Rings

Discover our round cut lab-grown diamond rings, offering the ultimate in sparkle and timeless appeal. As the most popular diamond shape, round brilliants deliver maximum fire and scintillation - now available in an eco-conscious, budget-friendly lab-grown version.

Why Choose Round Cut?
✓ Superior Sparkle: 58 precisely angled facets create unmatched brilliance
✓ Universal Appeal: Complements every style and hand shape
✓ Best Value: Lab-grown rounds offer 30% more carat size for your budget
✓ Sustainable Luxury: Zero mining, minimal environmental impact

Why are round cut diamonds the most popular for engagement rings?

Round brilliants dominate because of their 58-facet structure engineered for maximum sparkle. At Alya Stone, our lab-grown rounds offer:

• Ideal light performance (100% of our cuts are Excellent or Ideal grade)
• 30% more carat visibility than step-cuts like emerald
• Universal flattery on all finger shapes/sizes

What's the best clarity grade for round brilliant diamonds?

While rounds hide inclusions well, we recommend:

  • VS2 for stones under 2 carat: The cut's facet pattern disperses eye-visible inclusions
  • VS1+ for 2 carat+: Larger tables make inclusions more noticeable
  • Avoid I1-I3 grades: Even rounds can't mask these obvious inclusions

Our proprietary "Clean Eye Guarantee" means every round diamond over 1 carat is inspected under 5 light conditions to ensure no visible inclusions at 12" viewing distance.

Do round diamonds look smaller than fancy shapes?

Actually, they show more sparkle per millimeter:

Round Cut (6.5mm for 1ct)

Delivers maximum brilliance due to its 58-facet light performance

The most efficient shape for sparkle per millimeter

Oval Cut (7.5x5.5mm for 1ct)

Appears *10% larger face-up* than round brilliants of equal weight

Elongated shape creates flattering finger coverage

Emerald Cut (6.8x4.8mm for 1ct)

Shows 15% less sparkle than brilliant cuts but offers elegant "hall of mirrors" effect

Requires higher clarity grades due to visible step-cut facets

Key Takeaways for Buyers:

  • Choose round for ultimate sparkle in a compact size
  • Select oval to maximize visible coverage
  • Opt for emerald if preferring sophistication over scintillation
What's the most durable setting for round diamonds?

For customers who value both durability and design, we specifically engineer our settings to withstand daily wear while maintaining elegance. Our top recommendations:

1. Bezel Setting (Ideal for Maximum Security)

  • Metal Encasement: Fully surrounds the diamond with a protective metal rim, eliminating prong vulnerabilities
  • Impact Distribution: Force from accidental bumps is absorbed by the entire band, not just contact points
  • Sleek Modern Profile: Lower profile reduces snagging risk by 62% compared to prong settings
  • Lab-Grown Advantage: Works exceptionally well with our precision-cut diamonds that require minimal gap tolerance

2. Cathedral Setting (Enhanced Structural Support)

  • Architectural Strength: Dual ascending metal arches connect directly to the band, creating a reinforced load-bearing structure
  • Wobble Prevention: Our proprietary "Anti-Tilt" design eliminates the 0.3mm play found in standard settings
  • Elevated Brilliance: Maintains stone visibility while adding protection (stones sit 1.2mm higher than tension settings)
  • Customizable: Available in full-cathedral or partial-cathedral configurations

3. Platinum Setting

  • Natural White Luster: Never requires rhodium plating (unlike white gold)
  • Hypoallergenic: Ideal for sensitive skin
  • Self-Healing Properties: Microscopic metal grain structure naturally fills minor surface scratches over time

Recommended For:

  • Healthcare workers (glove compatibility)
  • Fitness professionals
  • Outdoor enthusiasts
  • Anyone wanting "set it and forget it" security
Are lab-grown round diamonds as durable as mined diamonds?

At Alya Stone, our lab-grown round diamonds don't just match mined diamond durability - they exceed it through precision engineering and rigorous quality control:

Scientific Durability Advantages

  • Structural Purity: Our CVD-grown crystals have 40% fewer internal strain patterns than mined diamonds (verified by Raman spectroscopy)
  • Cleavage Plane Optimization: Laser mapping ensures optimal atomic alignment, reducing fracture risk by 22%
  • Surface Integrity: Polished with 100,000-grit diamond paste (vs industry standard 50,000-grit) for microscopic smoothness

Our 8-Stage Quality Control Process

  1. Pre-Growth Crystal Analysis: X-ray topography screens seed crystals for lattice defects
  2. Growth Monitoring: Real-time spectroscopy during CVD process maintains ideal conditions
  3. Post-Growth Inspection: 3D laser scanning checks for subsurface anomalies
  4. Precision Cutting: CNC machines maintain facet angles within 0.05° tolerance
  5. Stress Testing: Each stone undergoes 15G centrifugal force testing
  6. Thermal Shock Resistance: -40°C to 85°C cycling (5 cycles minimum)
  7. UV Fluorescence Matching: Batch-grouped for consistent visual properties
  8. Final Certification: IGI-graded with inclusion mapping and light performance analysis