White Default Shadow

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.

Radiant and Half Moon 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

Cushion and Half Moon Setting

Oval and Half Moon Setting

Princess and Half Moon Setting

Round and Half Moon Setting

Radiant and Trapezoid Setting

High Quality Created Diamonds set in White Gold Radiant and Half Moon Setting (Main View)

Diamonds set in White Gold Radiant and Half Moon Setting (Profile View)

Hand Selected Diamonds Radiant and Half Moon Diamond Engagement Ring in White Gold (Side View)

Yellow Gold Radiant and Half Moon Setting featuring Lab Diamonds (Main View)

High Quality Diamonds Radiant and Half Moon Setting in Yellow Gold (Main View)

Rose Gold Radiant and Half Moon Diamond Engagement Ring featuring Hand Selected Lab Diamonds (Main View)

Lab Diamonds set in Rose Gold Radiant and Half Moon Diamond Engagement Ring (Main View)

Platinum & Yellow Gold Radiant and Half Moon Setting featuring Synthetic Diamonds (Main View)

Diamonds set in Platinum & Yellow Gold Radiant and Half Moon Diamond Engagement Ring (Profile View)

Diamonds set in Platinum & Yellow Gold Radiant and Half Moon Setting (Profile View)

Exceptional Quality Lab Grown Diamonds set in Platinum & Rose Gold Radiant and Half Moon Diamond Engagement Ring (Main View)

Hand Selected Lab Diamonds set in Platinum & Rose Gold Radiant and Half Moon Diamond Engagement Ring (Profile View)

Platinum & Rose Gold Radiant and Half Moon Setting featuring Lab Diamonds (Main View)

Diamonds Radiant and Half Moon Diamond Engagement Ring in Platinum & Rose Gold (Profile View)

14k yellow gold 2ct radiant and half moon lab diamond engagement ring ada diamonds design ad 489

14k yellow gold radiant and half moon lab diamond engagement ring ada diamonds design ad 489

2.0 Carat Lab Grown Diamonds set in Yellow Gold Radiant and Half Moon Setting (Main View)

yellow gold two carat radiant cut and half moon lab diamond ring ada diamonds design ad 489

yellow gold two carat radiant cut man made diamond engagement ring with half moon side stones ada diamonds design ad 489 on model

Yellow gold 2ct radiant cut and half moon lab diamond ring with half eternity band ada diamonds design ad489 and ad083

yellow gold 2ct radiant cut and half moon three stone lab diamond engagement ring with wedding band ada diamonds design ad489

2.0 Carat Lab Diamonds set in Yellow Gold Radiant and Half Moon Setting (Main View)

2.5ctw Radiant and Half Moon Three Stone Engagement Ring in 14k Yellow Gold

Yellow Gold Radiant and Half Moon Setting featuring 2.0 Carat Diamonds (Profile View)

2.5ctw Radiant and Half Moon Three Stone Engagement Ring in 14k Yellow Gold Profile View

Your Choice of Gold: 0.20ct Each Side Stones (~0.40ctw): $2,650 USD0.25ct Each Side Stones (~0.50ctw): $2,750 USD0.30ct Each Side Stones (~0.60ctw): $2,900 USD0.40ct Each Side Stones (~0.80ctw): $3,450 USD0.50ct Each 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 versatile three stone engagement ring setting, featuring a pair of brilliant cut half-moon shaped lab grown diamond side stones in a classic cathedral style.

Radiant and Half Moon Setting

Three Stone Basket

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.