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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.

Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 2.25 Carat Lab Diamonds (Side View)

Not sure what style your sweetheart desires? Ensure your proposal is a complete surprise! A non-customized version of this setting qualifies for our <a href="/proposal-settings">Proposal Setting program</a>.

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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>

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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_!

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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 Classic Four Prong Solitaire

Round Classic Four Prong Solitaire

Cushion Classic Four Prong Solitaire

Emerald Classic Four Prong Solitaire

Princess Classic Four Prong Solitaire

Radiant Classic Four Prong Solitaire

Oval Classic Four Prong Pavé Setting

Exceptional Quality Created Diamonds Oval Classic Four Prong Solitaire Diamond Engagement Ring in White Gold (Main View)

2.0 Carat Lab Diamonds set in Platinum & 18k Yellow Gold Oval Classic Four Prong Solitaire (Profile View)

2.0 Carat Lab Diamonds set in Platinum & 14k Rose Gold Oval Classic Four Prong Solitaire (Profile View)

2.0 ct Lab Diamonds set in 18k Rose Gold Oval Classic Four Prong Solitaire (Profile View)

High Quality Lab Created Diamonds set in White Gold Oval Classic Four Prong Solitaire (Profile View)

Lab Diamonds Oval Classic Four Prong Solitaire in White Gold (Profile View)

Man Made Diamonds set in White Gold Oval Classic Four Prong Solitaire (Side View)

Diamonds set in Yellow Gold Oval Classic Four Prong Solitaire (Main View)

Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring Lab Created Diamonds (Main View)

Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring Lab Diamonds (Main View)

Lab Diamonds Oval Classic Four Prong Solitaire Diamond Engagement Ring in Rose Gold (Main View)

Created Diamonds Oval Classic Four Prong Solitaire in Rose Gold (Main View)

Lab Diamonds set in Rose Gold Oval Classic Four Prong Solitaire (Main View)

High Quality Man Made Diamonds set in Rose Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

Lab Diamonds Oval Classic Four Prong Solitaire Diamond Engagement Ring in Yellow Gold (Main View)

1.25 Carat Created Diamonds Oval Classic Four Prong Solitaire in Yellow Gold (Profile View)

Platinum Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 1.75 Carat Synthetic Diamonds (Main View)

Platinum Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 1.75 Carat Man Made Diamonds (Side View)

Yellow Gold Oval Classic Four Prong Solitaire featuring High Quality 2.25 Carat Lab Diamonds (Main View)

Exceptional Quality 2.75 ct Lab Diamonds Oval Classic Four Prong Solitaire Diamond Engagement Ring in Yellow Gold (Side View)

Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 2.5 ct Lab Diamonds (Side View)

18k Yellow Gold 1.5 Carat Oval Classic Four Prong Lab Diamond Solitaire Engagement Ring in 18k Yellow Gold Ada Diamonds Design AD-327 Macro

18k Yellow Gold 1.5 Carat Oval Classic Four Prong Lab Diamond Solitaire Engagement Ring in 18k Yellow Gold Ada Diamonds Design AD-327 Profile

14k Yellow Gold 3 Carat Oval Lab Diamond Classic Four Prong Solitaire Ada Diamonds Design AD-327 Profile

14k yellow gold 3 ct oval classic four prong manmade diamond solitaire engagement ring ada diamonds design ad 327 profile view

Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 2.75 Carat Man Made Diamonds (Main View)

White Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 2.0 Carat Diamonds (Side View)

2.0 Carat Lab Diamonds set in White Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring (Profile View)

White Gold Oval Classic Four Prong Solitaire featuring Hand Selected 3.0 Carat Lab Diamonds (Main View)

3.0 ctw Diamonds Oval Classic Four Prong Solitaire Diamond Engagement Ring in White Gold (Side View)

3.0 ct Lab Diamonds Oval Classic Four Prong Solitaire Diamond Engagement Ring in White Gold (Profile View)

High Quality 2.0 Carat Diamonds set in 18k Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

Hand Selected 2.25 ctw Diamonds set in 18kt Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring (Side View)

Exceptional Quality 2.75 Carat Lab Diamonds Oval Classic Four Prong Solitaire in Platinum & Yellow Gold (Main View)

Platinum & Yellow Gold Oval Classic Four Prong Solitaire featuring 1.75 ctw Lab Diamonds (Profile View)

Platinum & 14k Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 3.0 Carat Diamonds (Main View)

Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 1.5 Carat Diamonds (Main View)

1.5 ct Lab Diamonds set in Oval Classic Four Prong Solitaire Diamond Engagement Ring (Profile View)

2ct Platinum Oval Classic Four Prong Solitaire with Lab Created Diamond Ada Diamonds Design AD-327 Profile

Hand Selected 1.5 ct Synthetic Diamonds Oval Classic Four Prong Solitaire in Platinum (Main View)

Platinum Oval Classic Four Prong Solitaire featuring Exceptional Quality 1.5 ct Lab Diamonds (Profile View)

3.0 Carat Lab Diamonds set in Platinum & 14k Yellow Gold Oval Classic Four Prong Solitaire (Side View)

1.25ct oval in classic solitaire yellow gold

High Quality 1.5 ct Lab Diamonds set in Oval Classic Four Prong Solitaire ()

1.75ct Oval Classic Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-327 on Model

2.0 ct Lab Created Diamonds set in Yellow Gold Oval Classic Four Prong Solitaire (Main View)

Yellow Gold Oval Classic Four Prong Solitaire featuring Hand Selected 2.0 ctw Created Diamonds (Main View)

White Gold 2.25ct Oval Manmade Diamond Solitaire Engagement Ring Ada Diamonds Design AD-327 on Model

2.5 ct Lab Grown Diamonds set in 14k Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

Platinum & Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring High Quality 2.75 ct Lab Created Diamonds (Main View)

14kt Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring Hand Selected 2.75 Carat Lab Grown Diamonds (Main View)

3.0 Carat Diamonds set in White Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

Platinum & 14k Yellow Gold Oval Classic Four Prong Solitaire featuring 3.0 ct Man Made Diamonds (Side View)

14k Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 3.25 Carat Diamonds (Main View)

Platinum Oval Classic Four Prong Solitaire featuring 1.5 ctw Lab Created Diamonds (Profile View)

14k Yellow Gold Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 2.75 Carat Diamonds

Platinum Oval Classic Four Prong Solitaire Diamond Engagement Ring featuring 1.75 ct Created Diamonds (Main View)

1.5 ct Diamonds set in Platinum Oval Classic Four Prong Solitaire Diamond Engagement Ring (Main View)

1.5ct Oval Classic Four Prong Solitaire Engagement Ring in Platinum

1.5 ctw Diamonds Oval Classic Four Prong Solitaire in Platinum (Profile View)

1.5ct Oval Classic Four Prong Solitaire Engagement Ring in Platinum Profile View

2.0 ct Diamonds Oval Classic Four Prong Solitaire in Yellow Gold (Main View)

2ct Oval Classic Four Prong Solitaire Engagement Ring in 18k Yellow Gold

Your Choice of Gold: $1,250 USD Platinum &amp; Two-Tone: $1,500 USD Pricing is for setting only - center stone priced separately.

Classic and timeless, this setting features four prongs for maximum security. Customize your lab diamond solitaire engagement ring with band widths of 1.8-2.5mm. 

Oval Classic Four Prong Solitaire

Classic Solitaires

Custom made-to-order solitaire 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.