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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.

Custom Three Stone Setting - Ada Diamonds

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

Custom Three Stone Lab Created Diamond Engagement Ring Design-180

Platinum 6ct Round and Trapezoid Custom Halo Engagement Ring with Lab Diamonds Ada Diamonds Design AD-180 Artistic

Platinum Six Carat Round and Trapezoid Halo Lab Diamond Ring Ada Diamonds Design AD-180 Profile

Platinum 6ct Custom Halo Round and Trapezoid Lab Diamond Ring Ada Diamonds Design AD-180  on Model

Platinum 6ct Custom Halo Round and Trapezoid Lab Diamond Ring Ada Diamonds Design AD-180 on Hand Profile

yellow gold 2ct oval lab diamond ring with trio of marquise and round side stones ada diamonds design ad 180

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Custom Oval and Pear Lab Diamond Engagement Ring Ada Diamonds Design AD-180

4ct asscher cut lab grown diamond engagment ring with custom straight bagutte side stone design and matching straight baguette eternity wedding band

oval and pear three stone with pave diamonds

custom six carat radiant cut lab grown diamond ring

Platinum Radiant Cut and Trapezoid 4 ct Lab Diamond Engagement Ring Ada Diamonds Design AD-180

Platinum 4 Carat Radiant Cut Lab Created Diamond Ring with Trapezoid Side Stones and Pavé Band Ada Diamonds Design AD-180 on Model

Radiant Cut and Trapezoid 4 Carat Lab Diamond Three Stone Ring Platinum Ada Diamonds Design AD-180 Profile View on Model

18k White Gold 2 Carat Asscher and Baguette Lab Diamond Ring Ada Diamonds Design AD-180 Macro

18k White Gold 2 Carat Asscher and Baguette Lab Diamond Five Stone Art Deco Engagement Ring Ada Diamonds Design AD-180 Profile View

1.5ct Oval Lab Diamond Ring with Round and Pear Side Stones Yellow Gold Ada Diamonds Design AD-180

14k Yellow Gold 1.5 carat Oval Lab Diamond Ring with Round and Pear Side Stones Ada Diamonds Design AD-180

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rose gold custom oval lab diamond ring with cluster round and marquise side stones ada diamonds design ad 180

14k rose gold 1.5 carat custom oval lab created diamond engagement ring with cluster marquise and oval side stones ada diamonds design ad 180

platinum 3.5 carat custom oval lab diamond engagement ring with baguette side stones ada diamonds design ad 180

custom platinum 3 ct oval lab grown diamond with baguette side stone engagement ring ada diamonds design ad 180

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yellow gold custom 1.5ct round lab diamond ring with round and marquise side stones ada diamonds design ad 180

yellow gold custom 1.5ct round lab diamond ring with round and marquise side stones ada diamonds design ad 180 on model

platinum custom oval and pear five stone lab diamond engagement ring with marquise wedding band and spacer band ada diamonds design ad 180 ad270 and ad295

platinum custom 2.5ct oval and pear five stone lab diamond engagement ring with marquise wedding band and spacer band ada diamonds design ad 180 ad270 and ad295

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14k yellow gold 2 carat oval lab grown diamond engagement ring with pear and round side stones ada diamonds design ad 180

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4ct Radiant Cut and Trapezoid Lab Diamond Engagement Ring with Pavé Band in Platinum | Ada Diamonds

2 Carat Asscher and Baguette Lab Diamond Art Deco Engagement Ring in White Gold | Ada Diamonds

6ct Custom Round and Trapezoid Halo Engagement Ring with Lab Diamonds in Platinum | Ada Diamonds

1.5ct Oval Lab Diamond Engagement Ring with Round and Pear Side Stones in Yellow Gold | Ada Diamonds

1.75ct Custom Oval and Round Lab Diamond Engagement Ring in 14k Yellow Gold | Ada Diamonds

1.75ct Three Stone Round Lab Diamond Engagement Ring with Twisting Band in Platinum | Ada Diamonds

2.5ct Emerald Cut & Princess Three Stone Halo Lab Diamond Engagement Ring in Platinum | Ada Diamonds

1.5ct Oval Lab Diamond Ring with Round & Marquise Cluster Side Stones  14k Rose Gold | Ada Diamonds

3.5 ct Custom Oval Lab Diamond Engagement Ring with Baguette Side Stones Platinum | Ada Diamonds

2.25 ct Custom Round Lab Diamond Engagement Ring with Round and Marquise Side Stones | Ada Diamonds

2.5 Carat Custom Oval and Pear Five Stone Lab Diamond Engagement Ring | Ada Diamonds

2ct Oval Lab Diamond Engagement Ring with Marquise & Round Side Stones Yellow Gold  | Ada Diamonds

2.5 Carat Custom Five Stone Lab Diamond Engagement Ring in 14k Yellow Gold | Ada Diamonds

Ada&#39;s engagement ring settings featuring lab grown side stones in your choice of gold start at $2,500 USD (price for setting with side stones only - center stone priced separately). Subject to availability. You will receive a custom quote from your Concierge. Some side stone shapes are not available. Platinum and two-tone available for an additional $300 fee.

Match your center stone with a perfect pair! Your Diamond Concierge is here to assist you in designing a stunning custom lab diamond three stone engagement ring. Inquire to get started!

Custom Three Stone Setting

Custom Three Stone

Custom made-to-order three stone engagement 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.