4 Carat Cushion Cut Lab-Grown Diamond Rings
Soft corners, a broad and glowing face. Each 4 carat cushion cut diamond ring here holds a lab-grown cushion fixed in place, with its cost inside the listed price. On the product page you settle the metal and the band: rounded and plain, paved at the shoulders, or hiding a halo over pavé.
$2,847 $5,694
$2,417 $4,834
$2,417 $4,834
$2,417 $4,834
$3,167 $6,334
$2,577 $5,154
$2,577 $5,154
$2,577 $5,154
$4,107 $8,214
$3,047 $6,094
More to discover
Reading the cushion
The cushion pairs a squarish or gently rectangular outline with rounded corners and wide facets that throw big, slow flashes. At four carats the face is broad and pillowy, gentler in feel than a sharp-cornered princess.
Setting a four-carat cushion
- Plain solitaire: a bare shank that leaves the whole outline on view.
- Pavé shoulders: a line of lab-grown diamond accents that meets the corners of the head.
- Hidden halo: accents curl beneath the cushion for sparkle from the side.
Metal color and the cushion
Platinum and white gold keep things cool and bright. Yellow gold leans into the cushion's old-world feel, and rose gold adds warmth without crowding the stone. A lab-grown cushion of this weight is priced at a fraction of its mined twin, which can leave budget for platinum.
Living with a big cushion
Its rounded corners chip less easily than pointed outlines. Still, a four-carat head stands tall; take the ring off for sports and heavy chores, and book a prong check once or twice yearly.
Ring questions, answered.
How do I choose an engagement ring?
Start with the shape she loves, then the setting style. Our gemologists can help you balance carat, cut and budget on a free video call.
Can I build my own engagement ring?
Yes — pick a setting, then a diamond, and review the finished ring before it goes to the bench.
Does the diamond price include the setting?
Diamond and setting are priced separately in the ring builder, and the total is shown before you add the ring to your bag.
How do I find my ring size?
Use our ring size guide, or order a free ring sizer — it arrives in 2–3 days.
Can I return or resize my ring?
You can return it within 30 days (a 10% restocking fee applies to resized or engraved pieces), and your first resize within 60 days of delivery is free.
Should I insure my engagement ring?
We recommend it. Every ring ships fully insured; once it is yours, a separate jewelry insurance policy covers loss, theft and accidental damage.
