2.5 Carat Cushion Cut Lab-Grown Diamond Rings, grown in light.
A broad cushion with a gentle outline. Here each ring comes with a 2.5 carat cushion cut lab-grown diamond set at its center, priced in. The designs run from a bare rounded band to pavé shoulders and a hidden halo. Pick platinum or gold in 10K, 14K or 18K for a 2.5 carat cushion cut lab-grown diamond engagement ring, built after you order.
$2,072 $4,144
$1,642 $3,284
$1,642 $3,284
$1,642 $3,284
$2,392 $4,784
$1,802 $3,604
$1,802 $3,604
$1,802 $3,604
$2,442 $4,884
$1,802 $3,604
Square or slightly long
Cushions vary from nearly square to gently rectangular. A square cushion reads soft and balanced on the hand; a longer one adds a hint of length to the finger. At two and a half carats, either outline is large enough that its proportions are the first thing people notice.
Setting styles
- Solitaire, plain band: a simple frame for a substantial stone.
- Solitaire, pavé shoulders: a short trail of lab-grown diamond accents toward the center.
- Hidden halo: extra sparkle under the cushion and along a pavé band.
Platinum against gold
Platinum keeps a cool white tone and is heavy on the finger. White gold looks similar and costs less. Yellow and rose gold give the cushion's large facets a warmer cast, a pairing with a vintage feel.
Daily wear at this size
A 2.5 carat cushion stands proud of the band, so a slim 2.2 mm shank keeps the ring comfortable beside a wedding band. Brush the underside of the stone weekly, since lotion builds up there fast on a cushion this deep. If a prong catches on a sweater, have a jeweler tighten it before the stone shifts.
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.
