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A sample of our hand-selected, pre-vetted, in-house inventory, immediately available for sale. Want to see more options? <a href="/inquire">Inquire</a> now for a curated list.&nbsp;

Our friendly Diamond Concierge Team is available to answer any questions you may have, help you choose a spectacular lab diamond, and customize this engagement ring to your exact specifications.

ER PDP Checkout Fine Print

Complimentary engraving up to 10 characters. Longer engravings or those with special characters may be available for an extra charge upon inquiry. Please note, resizing engraved rings may require an additional fee.

Not sure what size halo is best? <a href="/inquire">Please inquire</a> and a Diamond Concierge will be happy to discuss with you.

Always custom created, never mass-produced. We proudly craft all of our engagement rings in the USA.

Visit <a href="/visit">one of our showrooms</a> or join the thousands of clients around the world who work with us <a href="/diamond-concierge-process">entirely virtually</a>.

After checkout, a Concierge will contact you via email to confirm your order. Prior to production, you will receive a rendering of your ring's exact dimensions for your approval. If you are unresponsive, your order may be canceled.Have questions? Not ready to checkout? <a href="/inquire">Inquire</a> now and a Concierge will respond within 1 business day.&nbsp;

Setting Price as Currently Configured

PDP ER - Setting Price as Currently Configured

Free US Shipping fully insured with signature required to a residence, business address, or Fedex Office. Purchases over $15,000 will ship FedEx Priority Overnight. Purchases of less than $15,000 will ship Fedex Two Day. International Shipping to 69 countries, fully insured. International shipping fees start at $75 USD.

When it comes to durability and having an engagement ring that stands the test of time, platinum is our recommended choice for a white metal.

Read Our <a href="/synthetic-diamond-facts-and-misconceptions/frequently-asked-questions-about-lab-grown-diamonds">Frequently Asked Questions</a>See Our <a href="/buy-lab-diamonds">Diamond Pricing</a>

New to Lab Diamonds?

Overlay Centered

A Purchase This Important Deserves&nbsp;an <a href="/ada-vs-competition">Impeccable Buying Experience</a>

Why Choose Ada Diamonds?

Shop <a href="/wedding-bands">Wedding Bands</a> Shop <a href="/mens-wedding-bands">Men’s Bands</a>

From Will You? to _I Do_!

emerald-eternity-band-with-lab-grown-diamonds.jpg

Ada was founded by a husband-wife team. <a href="/about-ada-diamonds">Our Genesis</a> &amp; <a href="/ethical-supply-chains">Our Values</a>

Grown From Love

Founders of Ada Diamonds Sitting on a Beach at Sunset

Ready to Begin Your Concierge Experience?

Engagement Modal Form

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:

Ada Diamonds is the Leading Luxury Purveyor of Lab Diamonds

Asscher and Trillion Setting

Cushion and Trillion Setting

Emerald and Trillion Setting

Princess and Trillion Setting

Radiant and Trillion Setting

Diamonds Oval and Trillion Diamond Engagement Ring in White Gold (Main View)

Created Diamonds set in White Gold Oval and Trillion Setting (Main View)

Diamonds Oval and Trillion Diamond Engagement Ring in White Gold (Profile View)

Hand Selected Diamonds set in White Gold Oval and Trillion Setting (Profile View)

High Quality Lab Diamonds set in White Gold Oval and Trillion Setting (Side View)

Yellow Gold Oval and Trillion Setting featuring Lab Diamonds (Main View)

Diamonds set in Yellow Gold Oval and Trillion Diamond Engagement Ring (Main View)

Lab Diamonds set in Rose Gold Oval and Trillion Setting (Main View)

Rose Gold Oval and Trillion Setting featuring High Quality Diamonds (Main View)

Synthetic Diamonds Oval and Trillion Setting in Platinum & Yellow Gold (Main View)

Diamonds set in Platinum & Yellow Gold Oval and Trillion Diamond Engagement Ring (Profile View)

Exceptional Quality Diamonds Oval and Trillion Setting in Platinum & Yellow Gold (Profile View)

Platinum & Rose Gold Oval and Trillion Diamond Engagement Ring featuring Hand Selected Lab Diamonds (Main View)

High Quality Lab Diamonds set in Platinum & Rose Gold Oval and Trillion Diamond Engagement Ring (Profile View)

Lab Created Diamonds set in Platinum & Rose Gold Oval and Trillion Setting (Main View)

Platinum & Rose Gold Oval and Trillion Setting featuring Exceptional Quality Lab Created Diamonds (Profile View)

High Quality 2.0 ctw Man Made Diamonds Oval and Trillion Setting in Platinum (Main View)

platinum engagement ring featuring 3ct oval lab grown diamond with trillion side stones

1.5ct oval lab grown diamond with trillion side stones set in 14k white gold

gia graded oval laboratory grown diamond set with trillion side stones

14k white goldl oval and trillion setting featuring 2.25ct oval man made diamond and trillion side stones ada diamonds design

18k white gold oval and trillion setting featuring gia graded laboratory grown diamonds

1.5 Carat Lab Diamonds Oval and Trillion Setting in Rose Gold (Main View)

1.75ct lab grown diamond oval and trillion engagement ring in 18k rose gold with 18k rose gold twisting wedding band ada diamonds

oval lab grown diamond set with trillion side stones in a platinum setting

1.25 Carat Lab Grown Diamonds Oval and Trillion Setting in White Gold (Main View)

Hand Selected 2.25 Carat Lab Diamonds Oval and Trillion Diamond Engagement Ring in Platinum (Main View)

18k rose gold wedding ring with 2 ct oval laboratory grown diamond center stone accompanied by lab grown trillion side stones ada diamonds

1.75 Carat Synthetic Diamonds set in Platinum Oval and Trillion Diamond Engagement Ring (Profile View)

1.5 ctw Diamonds Oval and Trillion Setting in Platinum (Profile View)

white gold 1.5ct oval and trillion three stone lab diamond engagement ring ada diamonds design ad 461 on model

Lab Created Diamonds Oval and Trillion Diamond Engagement Ring in Platinum (Main View)

1.75 carat oval lab created diamond wedding ring set with trillion side stones on 14k white gold metal

1.5ct oval lab grown diamond with trillion side stones set in 14k rose gold with custom twisting style wedding band

custom 2 ct oval lab grown diamond engagement ring with trillion side stones in platinum ada diamonds

2.0 Carat Lab Diamonds Oval and Trillion Diamond Engagement Ring in Platinum (Main View)

ada diamond 2.25ct oval lab grown diamond custom engagement ring featuring trillion side stones

Hand Selected 2.0 Carat Diamonds Oval and Trillion Diamond Engagement Ring in Platinum (Main View)

2.25ct Oval and Triangular Brilliant Three Stone Engagement Ring in Platinum

2.0 ct Diamonds Oval and Trillion Diamond Engagement Ring in Platinum (Profile View)

2.25ct Oval and Triangular Brilliant Engagement Ring in Platinum Profile View

High Quality 1.5 Carat Lab Diamonds Oval and Trillion Setting in Rose Gold (Main View)

2ctw Oval and Triangular Brilliant Three Stone Engagement Ring in 18k Rose Gold

Your Choice of Gold: Triangular Brilliants (Straight):3.25mm Side Stones (~0.2ctw): $2,450 USD3.5mm Side Stones (~0.3ctw): $2,550 USD4mm Side Stones (~0.4ctw): $2,650 USD4.5mm Side Stones (~0.5ctw): $2,750 USD4.75mm Side Stones (~0.6ctw): $2,900 USD Trillions (Rounded):4mm Side Stones (~0.4ctw): $2,650 USD4.5mm Side Stones (~0.5ctw): $3,150 USD5mm Side Stones (~0.8ctw): $3,450 USD5.5mm Side Stones (~1.0ctw): $3,750 USD Starting at price is for the setting and side stones only (center stone priced separately) and includes DEF/VS lab grown diamond side stones. Platinum and two-tone available for an additional $300 fee. Subject to availability; all side stone weights and measurements are approximate.

A dazzling setting, featuring a pair of trillion (rounded edges) or triangular brilliant (straight edges) lab grown diamonds. Available in a basket or trellis style.

Oval and Trillion Setting

Three Stone Trillion

Custom made-to-order three stone ring featuring conflict-free lab diamonds hand-selected for quality, fire, and brilliance. Available options: platinum, 14k or 18k gold: white, yellow, rose. Ada Diamonds is the leading luxury purveyor and the best place to buy a lab diamond. Virtual consultations available worldwide; private in-person appointments available in San Francisco, New York, and Austin TX.