Cushion Solitaire Double-Split Cathedral Wide Flat-Top Lab Grown Diamond Engagement Ring 1.50ctw
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 Cushion Solitaire Lab Grown Diamond Engagement Ring lets the pillow-shaped brilliance of a 1.50ctw cushion-cut lab grown diamond exist without competition. Four round bead prongs grip the stone with minimum intrusion, while a double-split cathedral gallery — parallel vertical struts forming an open box frame on each side — provides clean structural support.
The wide flat-top shank gives this ring significant physical presence without side stones or surface decoration. Broad, flat on the upper face, and gently domed on the interior for exceptional comfort, it provides a commanding stage for the lab grown diamond.
Available in 10K/14K/18K White, Yellow, or Rose Gold and Platinum.
Ring Details
Item No. - R-DOC-175
Total Carat Weight - 1.50
Approx Gold Weight - 3.78g - 7.34g (Varies by metal type)
Setting Type - 4-Prong Round Bead, Double-Split Cathedral Box-Frame Gallery
Center Diamond Details
Stone Type - Lab Grown Diamond
Carat Weight - 1.50
Shape - Cushion
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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