custom lab diamond engagement ring with sapphire side stones ada diamonds

Cushion Cut Lab Diamonds of Various Sizes

Ada Diamonds specializes in large, sensational lab diamonds of the highest quality. Every ring is custom and made to order by award-winning artists in the USA. Our cushion lab diamonds are hand-selected for incredible sparkle and patterning. We offer both square and elongated cushions!

Explore custom cushion cut lab diamond engagement rings



yellow gold cushion cut in halo
lab created cushion cut engagement ring in yellow gold

1.5 Carat Halo Engagement Ring

14k yellow gold halo engagement ring featuring a 1.5 carat square cushion cut lab grown diamond. See additional design details for this Cushion Single Halo Ring.



2ct cushion cut lab diamond with tapered baguettes
platinum three stone engagement ring with cushion cut

2 Carat Three Stone Engagement Ring

Platinum three stone engagement ring featuring a 2 carat square cushion cut lab grown diamond. See additional design details for this Cushion and Tapered Baguette Ring.



2.5ct cushion cut lab diamond engagement ring
lab diamond halo pave engagement ring

2.5 Carat Halo Engagement Ring

Platinum halo engagement ring featuring a 2.5 carat square cushion cut lab grown diamond. See additional design details for this Cushion Halo Pave Ring.



3ct elongated cushion cut lab diamond in pave setting
lab diamond cushion cut engagement ring in platinum

3 Carat Diamond Band Engagement Ring

Platinum diamond band engagement ring, featuring a 3 carat cushion cut lab grown diamond. See additional design details for this Cushion Cathedral Solitaire.



3.5ct cushion cut lab diamond in two-stone solitaire
lab diamond cushion cut in solitaire

3.5 Carat Solitaire Engagement Ring

14k yellow and white gold solitaire engagement ring featuring a 3.5 carat square cushion cut lab grown diamond. See additional design details for this Cushion Cathedral Solitaire.



4ct cushion in petite solitaire
lab created cushion cut solitaire engagement ring

4 Carat Solitaire Engagement Ring

14k yellow and white gold solitaire engagement ring featuring a 4 carat elongated cushion cut lab grown diamond. See additional design details for this Cushion Petite Four Prong Solitaire.



Ada Diamonds is the Leading Luxury Purveyor of Lab Diamonds

Ada Diamonds specializes in large, sensational diamonds of superlative quality. Our diamonds are cut from the highest purity diamond crystals, have optimal cut and sparkle, and are always eye clean. Much like mined diamonds, lab diamonds are priced based on their quality characteristics. Use the tool below to understand our pricing:

Select Your Carat Weight

ColorlessNear Colorless
DEFGH I
IFPremium
$4,950 to
$5,800
Standard
$3,150 to
$3,950
VVS1
VVS2
VS1
VS2
SIUnexceptional
Not sold by Ada Diamonds
I

Pricing in USD. Subject to availability.


This chart shows a range of approximate prices across various size and quality levels and should serve as a rough guideline, not an exact calculator. Lab diamonds are unique SKU’s whose individual prices may be influenced by attributes beyond the 4 C’s. Prices are subject to change.


Ready to create your own custom emerald cut lab diamond engagement ring?



custom lab diamond engagement rings ada diamonds

Shop Engagement Rings

Every lab diamond we sell has been hand-selected by our experts for impeccable quality. Build something beautiful today.

custom lab diamond round solitaire engagement ring ada diamonds

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Shop fine jewelry for occasions big and small, featuring curated, conflict-free lab grown diamonds.

ada diamonds custom lab grown diamond engagement rings

New to Lab Diamonds?

Explore resources to learn about lab diamonds, discover the Ada Diamonds difference, and more.