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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


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.


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.


2.5 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.


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.


3.5 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.


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
$3,950 to
$4,950		Standard
$2,500 to
$3,150
VVS1
VVS2
VS1
VS2
SIUnexceptional
Not sold by Ada Diamonds
I

Pricing in USD. Subject to availability.

View 2 CARAT Diamond Engagement Rings

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?