Cushion Solitaire Shared Prong Lab Grown Diamond Engagement Ring 2.80ctw
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 Cushion Solitaire Lab Grown Diamond Engagement Ring with Shared Prong Shank beautifully balances modern elegance with substantial sparkle. A breathtaking 2.20ctw cushion-cut lab grown center diamond commands attention in an elevated 4-prong cathedral setting, while a single row of large shared-prong set round lab grown diamonds flows along both shoulders of the shank, creating a bold 2.80 total carat weight.
The shared prong setting places each shoulder lab grown diamond closely alongside its neighbour, separated only by a single shared prong — maximising the diamond surface visible along the band for a look far more substantial than the stone count alone would suggest. The open cathedral arch gallery beneath the center elevates the cushion cut proudly above the band and allows light to flood through from below. No halo competes with this center stone — the cushion-cut lab grown diamond is the undisputed star.
Available in 10K/14K/18K White, Yellow, or Rose Gold and Platinum.
Ring Details
Item No. - R-DOC-111
Total Carat Weight - 2.80
Approx Gold Weight - 3.60g - 6.98g (Varies by metal type)
Setting Type - Cushion Solitaire with Single-Row Shared Prong Shank
Center Diamond Details
Stone Type - Lab Grown Diamond
Carat Weight - 2.20
Shape - Cushion
Color - E-F
Clarity - VS1-VS2
Side Diamond Details
Stone Type - Lab Grown Diamond
Total Carat Weight - 0.60
Shape - Round lab grown diamonds (single-row shared prong shank)
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
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