Ada Diamonds specializes in curating spectacular lab grown diamonds of the highest quality. Every ring is custom and made to order by award-winning artists in the USA. Here are some gorgeous 3.5 carat lab created diamond engagement rings we have created for past clients.

3.5 Carat Round Six Prong Solitaire Engagement Ring

Two-tone platinum and yellow gold solitaire engagement ring featuring a 3.5 carat round lab grown diamond. See additional design details!

3.5 Carat Radiant Three Sided Pavé Engagement Ring

Platinum diamond band engagement ring featuring a 3.5 carat radiant cut lab grown diamond center stone. See additional design details!

3.5 Carat Cushion Petite Solitaire Engagement Ring

18k yellow gold and platinum solitaire engagement ring featuring a 3.5 carat cushion cut lab grown diamond.

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3.5 Carat Asscher Cut Three Stone Engagement Ring

Platinum three stone engagement ring featuring a 3.5 carat asscher cut lab diamond center stone with trapezoid lab diamond side stones. See additional design details!

3.5 Carat Pear Solitaire Engagement Ring

Platinum solitaire engagement ring featuring a 3.5 carat pear lab grown diamond center stone. See additional design details!

3.5 Carat Round Cathedral Pavé Engagement Ring

Platinum diamond band engagement ring featuring a 3.5 carat round lab grown diamond center stone. See additional design details!

3.5 Carat Pear Cathedral Pavé Engagement Ring

Platinum diamond band engagement ring featuring a 3.5 carat pear lab grown diamond center stone. See additional design details!

3.5 Carat Oval Three Stone Engagement Ring

Platinum three stone engagement ring featuring a 3.5 carat oval cut lab diamond center stone with trapezoid lab diamond side stones. See additional design details!

3.5 Carat Cushion Petite Solitaire Engagement Ring

Platinum solitaire engagement ring featuring a 3.5 carat cushion cut lab grown diamond. See additional design details!

3.5 Carat Oval Petite Solitaire Engagement Ring

14k yellow gold solitaire engagement ring featuring a 3.5 carat oval lab diamond. See additional design details!

3.5 Carat Emerald Three Stone Engagement Ring

Platinum three stone engagement ring featuring a 3.5 carat emerald cut lab diamond center stone with tapered baguette lab diamond side stones. See additional design details!

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About Lab Diamonds

Learn how lab diamonds are grown, how they are priced relative to mined diamonds, and more.

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Our curated fine jewelry collections feature expert-curated lab diamonds.