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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.

Round Petite Four Prong Solitaire - Ada Diamonds

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 Petite Four Prong Solitaire

Cushion Petite Four Prong Solitaire

Emerald Petite Four Prong Solitaire

Oval Petite Four Prong Solitaire

Pear Petite Solitaire

Princess Petite Four Prong Solitaire

Radiant Petite Four Prong Solitaire

Round Petite Four Prong Pavé Setting

White Gold Round Petite Four Prong Solitaire featuring Diamonds (Main View)

Lab Grown Diamonds Round Petite Four Prong Solitaire Diamond Engagement Ring in White Gold (Profile View)

Diamonds set in White Gold Round Petite Four Prong Solitaire Diamond Engagement Ring (Side View)

Yellow Gold Round Petite Four Prong Solitaire featuring High Quality Diamonds (Main View)

Hand Selected Lab Diamonds Round Petite Four Prong Solitaire in Yellow Gold (Main View)

Rose Gold Round Petite Four Prong Solitaire featuring Hand Selected Lab Grown Diamonds (Main View)

Diamonds Round Petite Four Prong Solitaire in Rose Gold (Main View)

Diamonds set in Platinum & Yellow Gold Round Petite Four Prong Solitaire Diamond Engagement Ring (Main View)

Platinum & Yellow Gold Round Petite Four Prong Solitaire Diamond Engagement Ring featuring Lab Diamonds (Profile View)

Diamonds Round Petite Four Prong Solitaire in Platinum & Yellow Gold (Profile View)

Diamonds Round Petite Four Prong Solitaire Diamond Engagement Ring in Platinum & Rose Gold (Main View)

Man Made Diamonds set in Platinum & Rose Gold Round Petite Four Prong Solitaire Diamond Engagement Ring (Profile View)

Exceptional Quality Synthetic Diamonds set in Platinum & Rose Gold Round Petite Four Prong Solitaire Diamond Engagement Ring (Main View)

Lab Created Diamonds Round Petite Four Prong Solitaire in Platinum & Rose Gold (Profile View)

Platinum Round Petite Four Prong Solitaire featuring 3.0 Carat Diamonds (Main View)

14k yellow gold 4 ct round solitaire engagement ring featuring lab created diamond ada diamonds design ad 066 macro

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Round Petite Four Prong Solitaire featuring Diamonds (Profile View)

Platinum Round Petite Four Prong Solitaire featuring Exceptional Quality 3.0 ct Lab Diamonds

Round Petite Four Prong Solitaire featuring Lab Created Diamonds (Profile View)

Round Petite Four Prong Solitaire featuring Lab Diamonds (Profile View)

Platinum & Yellow Gold Round Petite Four Prong Solitaire Diamond Engagement Ring featuring High Quality 3.25 ctw Diamonds (Profile View)

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Exceptional Quality 2.0 ct Lab Diamonds set in 14k Rose Gold Round Petite Four Prong Solitaire Diamond Engagement Ring (Profile View)

2.0 ct Diamonds set in 14k Rose Gold Round Petite Four Prong Solitaire (Side View)

3.0 ct Man Made Diamonds set in Yellow Gold Round Petite Four Prong Solitaire Diamond Engagement Ring (Side View)

14k Yellow Gold 2ct Round Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-066 Profile View

18k Yellow Gold 3 Carat Round Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-066 Profile

18k Yellow Gold Round 2.75 Carat Petite Four Prong Lab Diamond Solitaire Engagement Ring Ada Diamonds Design Number AD-066 Artistic Shot in Box

Platinum 3.25 Carat Round Lab Created Diamond Solitaire Engagement Ring Ada Diamonds Design AD066 Floral Background

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platinum and rose gold four carat round lab diamond solitaire engagement ring ada diamonds design ad 066 profile view

18kt Yellow Gold Round Petite Four Prong Solitaire Diamond Engagement Ring featuring 3.0 ctw Diamonds

Yellow Gold Round Petite Four Prong Solitaire Diamond Engagement Ring featuring 3.0 Carat Lab Diamonds (Main View)

Yellow Gold Round Petite Four Prong Solitaire Diamond Engagement Ring featuring High Quality 3.0 ctw Diamonds (Profile View)

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1.25 Carat Round Brilliant Solitaire Engagement Ring Yellow Gold Ada Diamonds Design Number AD-066 on Hand

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14k yellow gold 1.75 ct round petite four prong lab diamond solitaire engagement ring ada diamonds design ad 066 on model

14k yellow gold 2ct round lab diamond solitaire engagement ring on model

Platinum & Yellow Gold Round Petite Four Prong Solitaire featuring High Quality 2.25 ct Lab Grown Diamonds (Main View)

18k Yellow Gold Round Lab Diamond Solitaire on Model Ada Diamonds Design AD-066 On Hand

2.5 Carat Round Four Prong Solitaire Engagement Ring in Yellow Gold Made with Lab Diamonds Ada Diamonds Design Number AD-066 on Hand

Platinum & 18k Yellow Gold Round Petite Four Prong Solitaire featuring 2.5 Carat Lab Diamonds

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Platinum Round Petite Four Prong Solitaire featuring 3.0 ct Diamonds (Main View)

14k Yellow Gold Round Petite Four Prong Solitaire Diamond Engagement Ring featuring 3.0 Carat Diamonds (Main View)

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3.75ct lab diamond in petite four prong solitaire

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White Gold Round Petite Four Prong Solitaire featuring 4.5 ct Diamonds (Profile View)

Rose gold 2.5ct Round Lab Diamond Solitaire Engagement Ring Ada Diamonds Design AD-066 on Model

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14k Yellow Gold 1.5ct Round Lab Diamond Petite Four Prong Solitaire Engagement Ring with Lab Diamond Pavé Half Eternity Band Ada Diamonds Design AD-066 and AD-083 on Model

2.0 Carat Lab Diamonds Round Petite Four Prong Solitaire in Platinum & Yellow Gold (Main View)

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Lab Diamond Four Prong Solitaire Engagement Ring in Yellow Gold Ada Diamonds Design AD-066

Round Lab Grown Diamond Petite Four Prong Solitaire Engagement Ring in Platinum Ada Diamonds Design Number AD-66 on Hand

Round Petite Four Prong Solitaire featuring Created Diamonds

Round Petite Four Prong Solitaire Diamond Engagement Ring featuring High Quality Synthetic Diamonds

Round Petite Four Prong Solitaire featuring 2.0 ctw Diamonds

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

Romantic and delicate, this setting features petite prongs and a gallery wire for maximum light exposure. Customize your lab diamond solitaire engagement ring with band widths of 1.8-2.5mm. 

Round Petite Four Prong Solitaire

Petite Solitaires

Custom made-to-order round solitaire 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.