Classic Four-Prong Solitaire Lab Grown Diamond Engagement Ring 1.20ctw
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 Classic Four-Prong Solitaire Lab Grown Diamond Engagement Ring is the definition of timeless elegance — a pure, uncompromising lab grown diamond solitaire that puts every carat of its 1.20ctw round lab grown center diamond on full display.
The six-prong setting, often called the Tiffany-style setting, is the most celebrated solitaire mount in fine jewellery history. Six equally spaced bead prongs cradle the lab grown diamond from all sides, securing it with maximum safety while allowing light to enter from every angle for extraordinary brilliance. The open cathedral gallery beneath lifts the stone proudly above the band. A subtle double-groove detail runs along the top face of the wide plain polished shank on both sides — a refined architectural touch that elevates this classic design above the ordinary. No halo, no side diamonds, no distraction. Just the lab grown diamond.
Available in 10K/14K/18K White, Yellow, or Rose Gold and Platinum.
Ring Details
Item No. - R-DOC-124
Total Carat Weight - 1.20
Approx Gold Weight - 3.01g - 5.84g (Varies by metal type)
Setting Type - Classic 4-Prong Solitaire (Tiffany Style) — Cathedral Profile
Center Diamond Details
Stone Type - Lab Grown Diamond
Carat Weight - 1.20
Shape - Round
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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