Round Three Stone Lab Grown Diamond Engagement Ring 3.50ctw
All Runivi rings are sized in US sizing. Sizes highlighted are the most commonly ordered (US 6–7½).
| US Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 4 | 14.9 | 46.8 |
| 4½ | 15.3 | 48.0 |
| 5 | 15.7 | 49.3 |
| 5½ | 16.1 | 50.6 |
| 6 | 16.5 | 51.9 |
| 6½ | 16.9 | 53.1 |
| 7 | 17.3 | 54.4 |
| 7½ | 17.7 | 55.7 |
| 8 | 18.1 | 57.0 |
| 8½ | 18.5 | 58.3 |
| 9 | 18.9 | 59.5 |
| 9½ | 19.4 | 60.8 |
| 10 | 19.8 | 62.1 |
| 10½ | 20.2 | 63.4 |
| 11 | 20.6 | 64.7 |
| 11½ | 21.0 | 66.0 |
| 12 | 21.4 | 67.2 |
| 13 | 22.2 | 69.8 |
✔ Most commonly ordered: US 6, 6½, 7, 7½
Quick Tips
- Measure at the end of the day, when fingers are largest.
- Snug, not tight — the ring should pass your knuckle with slight resistance.
- Wider bands (4mm+) fit tighter — consider sizing up half a size.
- Between two sizes? Always size up.
- In stock, ready to ship
Our Round Three Stone Lab Grown Diamond Engagement Ring 3.50ctw makes a bold statement with a stunning 2.50-carat round brilliant lab grown center diamond flanked by two round brilliant lab grown side stones totaling 1.00 carat, for an impressive 3.50 total carat weight.
All three stones sit in close-set prong baskets at equal height, their combined brilliance creating a wide, luminous face above a plain high-polish wide tapered shank.
Available in 10K/14K/18K White, Yellow, or Rose Gold and Platinum.
Ring Details
Item No. - LT-02-LR-042
Style - Three Stone Engagement Ring
Total Carat Weight - 3.50
Approx Gold Weight - 4.41g - 8.56g (Varies by metal type)
Setting Type - 6-Prong Round Center, 4-Prong Round Sides, Plain Tapered Shank
Center Diamond Details
Stone Type - Lab Grown Diamond
Carat Weight - 2.50
Shape - Round Brilliant
Color - E-F
Clarity - VS1-VS2
Side Diamond Details
Stone Type - Lab Grown Diamond
Total Carat Weight - 1.00
No. of Stones - 2
Shape - Round Brilliant
Color - E-F
Clarity - VS1-VS2
Your Order Includes
- Free Shipping
- Delivered in Discreet Packaging
- Complimentary Professional Appraisal & IGI Certificate (if applicable)
- Free Lifetime Warranty
Every RUNIVI item is custom-made after your order is placed. We offer free and fully-insured shipping on all orders within US and Canada. Estimated delivery time is 10-12 business days from the date of your purchase.
If you are not 100% satisfied with your purchase, returns are accepted within 30 days of delivery. Learn more about our shipping & return policy.
Why Shop with us
Lifetime Warranty
IGI & Appraisal Certificate
Free Resizing & Shipping
Buy Now, Pay Later
