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Starting at price assumes a matched pair of F+ VS2+ lab diamonds in 14k. Exact carat weights may vary.Want bigger diamonds? Prefer to pick your own matched pair? Our friendly Diamond Concierge are here to assist you. <a href="/inquire">Inquire</a> to get started or learn more about our exclusive<a href="/diamond-concierge-process" target="_blank" rel="noopener noreferrer"> Concierge Experience</a>.

Starting at price assumes a F+ VS2+ lab diamond in 14k. Exact carat weights may vary.Want a bigger diamond? Prefer to pick your own? Our friendly Diamond Concierge are here to assist you. <a href="/inquire">Inquire</a> to get started or learn more about our exclusive<a href="/diamond-concierge-process"> Concierge Experience</a>.

Features DEF VS lab grown diamonds set in 14k. Carat weights are approximate.

Starting at price assumes DEF VS lab grown diamonds set in 14k. Carat weights are approximate.

Starting at price assumes a matched pair of F+ VS2+ lab diamonds in 14k. Exact carat weights may vary.&nbsp;

Starting at price assumes a matched pair of F+ VS2+ lab diamonds with DEF VS lab grown melee set with in 14k. Exact carat weights may vary.

Starting at price assumes a F+ VS2+ lab diamond. Exact carat weights may vary.

Starting at price assumes a F+ VS2+ lab diamond with DEF VS lab grown melee in 14k. Exact carat weights may vary.&nbsp;

Starting at price assumes DEF/VS lab grown diamonds in sizes 5-6 set in your choice of gold. Additional setting fee for platinum: $300. Diamond sizes and weights are approximate and subject to availability.

Starting at pricing assumes 14k yellow, 14k rose, 18k white, 18k yellow, or 18k rose gold in sizes 7-10. Pricing is for the setting only - center stone priced separately.All of Ada's solitaire settings are fully bespoke and made to order. Want to customize this ring to meet your needs? No problem. Our friendly Diamond Concierge are here to help you create the perfect ring.

Custom bands feature DEF/VS lab grown diamonds. Diamond sizes and weights are approximate and subject to availability. Please note that all custom bands of 4mm or wider are final sale and not eligible for return or re-size.

Available in our light comfort fit (~1.75mm height) and standard comfort fit (~2.2mm height). The two most popular widths for men are 5mm and 6mm. Starting at pricing assumes 18k white, yellow, or rose gold in light comfort fit in sizes 7-10. Additional costs: Platinum +$300 USD, standard weight +$400 USD. Available discounts: 14k yellow or rose gold -$200 USD; 4mm -$200 USD.Comparison shopping? The depth or height of the band contributes to the pricing of metal bands. Ada’s light comfort fit depth may be referred to as “mid weight” or even “heavy weight” by other brands. We believe your wedding band should feel comfortable, yet substantial.

Available in standard comfort fit (~1.9mm height). The two most popular widths for men are 5mm and 6mm. Starting at pricing assumes 18k white, yellow, or rose gold in comfort fit in sizes 7-10. Additional costs: Platinum +$300 USD. Available discounts: 14k yellow or rose gold -$200 USD; 4mm -$200 USD.Comparison shopping? The depth or height of the band contributes to the pricing of metal bands. We believe your wedding band should feel comfortable, yet substantial.

Starting at price assumes DEF/VS lab grown diamonds in sizes 5-6 set in your choice of gold. Additional setting fee for platinum: $300. Carat weights are approximate.

Starting at pricing assumes 14k yellow or rose gold in sizes 4-7.Note: Metal bands are not custom cast and are available as off-the-shelf items for expediency and cost. As a result, this ring may have very slight differences in color for yellow and rose gold from custom cast pieces. If you are interested in a custom cast band to accompany your wedding band set, please inquire.

Looking to purchase a single earring? We're happy to sell individually. Please inquire and a member of our Diamond Concierge Team will be happy to help.

Interested in another metal? <a href="/inquire">Please inquire</a>.

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>.

Our friendly Diamond Concierge Team is available to answer any questions, help you choose the perfect {{Jewelry_Type_Clean}}, or customize this design to your exact specifications.

This design is only available in a single carat weight. Please inquire if you would like to customize this design.

Setting Price as Currently Configured

PDP ER - Setting Price as Currently Configured

_Secret Sale_ Details

Limited quantities available. Secret Sale items may only be exchanged or returned for store credit and are not eligible for a refund.

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.

Set with friction posts and tension backs. Screw backs available upon request.&nbsp;

Lab diamonds of 0.70ct or larger are guaranteed to come with IGI, GCAL, or GIA grading reports. Lab diamonds smaller than 0.70ct may not be graded but have been assessed by Ada Diamonds staff.&nbsp;

Planning to wear this next to an engagement ring? Consider a <a href="/jewelry/spacer-band-295">Spacer Band</a> to protect your prongs.

Ready to order? A member of our Concierge team will confirm your order via email prior to production.

PDP - Wedding Bands - Purchase Fine Print

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 Lab Created Diamonds set in Rose Gold Carbon Necklace (Main View)

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Always Custom, Always Conscious Shop <a href="/engagement-rings-and-wedding-bands">Engagement Rings</a>

Bespoke Bridal

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Customer Reviews

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Regular Jewelry Modal

Ada&#39;s Carbon Necklace features ~0.21ctw of DEF VS lab grown diamonds set in 14k white, yellow, or rose gold. Arrives on an 18&quot; chain. Additional chain lengths available upon request. All of Ada&#39;s Delicate Collection pieces are proudly cast and hand-set in the USA. <a href="https://www.adadiamonds.com/delicate-collection" target="_blank">Shop the collection</a> to complete your look with coordinating pieces.  Our friendly Diamond Concierge are here to assist you with questions, if you&#39;d like to order multiple pieces, or if you&#39;d like to create something customized just for you. Looking for something different? Shop additional <a href="https://www.adadiamonds.com/ready-to-ship-jewelry" target="_blank">ready to ship jewelry</a>.

white gold carbon necklace with lab diamonds

yellow gold carbon necklace lab grown diamonds

Carbon Necklace

A six sided hexagon in honor of the element carbon, this lab created diamond pendant necklace features 7 total conflict-free lab diamonds at 0.21ctw. Available in 14kt yellow, white, or rose gold. Arrives on an 18" chain with a second loop to shorten to 16". The perfect gift to celebrate any occasion. Free shipping and 30 day returns.

Geometric Diamond Pendant

A geometric, modern lab created diamond pendant. The perfect gift to celebrate any occasion!

Carbon Necklace in 14k White Gold 0.21ctw

Carbon Necklace in 14k Yellow Gold 0.21ctw

Carbon Necklace in 14k Rose Gold 0.21ctw

0.21 Carat Round Diamonds Carbon Necklace in 14k White Gold (Main View)

High Quality 0.21 ctw Round Diamonds set in 14 Karat Yellow Gold 0.21ctw Geometric Diamond Pendant in 14k Yellow Gold (Main View)

14k Rose Gold Carbon Necklace featuring 0.21 Carat Round Diamonds (Main View)

Geometric Diamond Pendant featuring Round Lab Diamonds (Main View)

Geometric Diamond Pendant featuring Exceptional Quality Round Lab Grown Diamonds (Main View)

0.21 Carat Round Lab Diamonds set in 14k White Gold 0.21ctw Geometric Diamond Pendant in 14k White Gold (Main View)