Lab Grown Round Cut Engagement Rings

Start with a classic round style, customize, then choose your lab diamond.

Diamond Collar Pave Ring

Regular price
$1,490+
Regular price
Sale price
$1,490 USD

Three Stone Trillion Ring

Regular price
$3,340+
Regular price
Sale price
$3,340 USD

Radiant Cut Double Prong Cathedral

Regular price
$1,140+
Regular price
Sale price
$1,140 USD

Petite Cluster Ring

Regular price
$1,840+
Regular price
Sale price
$1,840 USD

Tulip Accented Ring

Regular price
$2,040+
Regular price
Sale price
$2,040 USD

Round Tulip Engagement Ring

Regular price
$1,390+
Regular price
Sale price
$1,390 USD

Radiant Cut Vintage Peekaboo Ring

Regular price
$1,590+
Regular price
Sale price
$1,590 USD

Low Profile Engagement Ring

Regular price
$1,190+
Regular price
Sale price
$1,190 USD

Round Engagement Ring

Regular price
$990+
Regular price
Sale price
$990 USD

6 Prong Engagement Ring

Regular price
$1,340+
Regular price
Sale price
$1,340 USD

Round Engagement Ring

Regular price
$1,190+
Regular price
Sale price
$1,190 USD

Twisted Band Diamond Ring

Regular price
$1,740+
Regular price
Sale price
$1,740 USD

Round 1.20ct E VVS2 IGI Lab Diamond Platinum Ring

Regular price
$1,626
Regular price
Sale price
$1,626 USD
Quick Ship

Round 3.20ct E VS2 IGI Lab Diamond Platinum Solitaire

Regular price
$4,536
Regular price
Sale price
$4,536 USD
Quick Ship

Round 3.46ct G VS2 IGI Lab Diamond Ring

Regular price
$2,689
Regular price
Sale price
$2,689 USD
Quick Ship

Round 1.36ct E VVS2 IGI Lab Diamond 6 Prong Mini Cathedral

Regular price
$1,849
Regular price
Sale price
$1,849 USD
Quick Ship

Curated Round Lab Diamonds

Plum's lab grown diamond selection only includes the best cut grades, making each round diamond engagement ring a stunner.


Curated Round Lab Diamonds

Plum's lab grown diamond selection only includes the best cut grades, making each round diamond engagement ring a stunner.

Lab grown round cut engagement rings

Lab Grown Round Cut Diamond Engagement Rings: Would you consider yourself a classic sort of person who appreciates the finer things in life? Then a round lab-grown diamond engagement ring could be your match made in diamond heaven.

At Plum Diamonds, we know round-cut engagement rings make a timeless statement you'll admire every day for decades to come. No manicure needed (but maybe a little manicure helps). Our stunning collection of lab-grown round-cut engagement rings has been thoughtfully designed around diamond-centric styles that never go out of fashion. Intuitive custom design is the name of the diamond game. We know every person is unique and deserves a custom ring to seal the deal, so every lab grown round diamond engagement ring is made to order in our own facility that has been certified sustainable. 

Do you have ethical concerns about a round-cut engagement ring? No need to worry. At Plum Diamonds, we only use ethically sourced, round lab grown diamonds to grace your finger forever. Our round lab grown diamonds give you more bang for your buck while still matching the beauty of a mined diamond.

Diamonds were first cut into the classic, round shape in the 17th century, but it wasn't till 100 years ago that they started to gain popularity for their well-balanced look. Most jewelers agree that a round brilliant-cut diamond uses its perfect symmetry to provide maximum glow and sparkle. If you were asked to picture a diamond engagement ring, a round brilliant cut solitaire ring is likely the first thing that would come to mind. There's a reason round-cut engagement rings are so classic.

We want our solitaire round-cut engagement rings, round halo engagement rings, and round three stones to grace fingers with confidence. This is why we provide a lifetime warranty with every ring purchase. So, are you ready to make memories that will last a lifetime? Choose a classic, round-cut engagement ring —  round-cut engagement rings can attract eyeballs and will put your new heirloom piece center stage. In other words, be prepared for a little diamond ring attention and a lot of confidence in your decision to choose a lab grown round diamond engagement ring.