4 Carat Diamond Ring

Design Your Dream 4 Carat Diamond Ring - Browse our favored and contemporary-classic ring designs to discover the ideal 4 carat diamond that fulfills your dream. Peruse our collection of diamond ring designs to find your perfect 4ct diamond engagement ring. Utilize the filters on the left to easily sift through our available selections.

Explore our extensive diamond inventory, boasting over 200,000 natural and lab-grown diamonds, ensuring you find the perfect diamond for your ring, regardless of your budget.

All of our loose diamonds are available to view in our Nour New York or Los Angeles showrooms. Simply book an appointment or call us now!

Exploring 4 Carat Diamond Rings

A 4 carat diamond ring is a genuine statement piece — larger than the average engagement ring by a clear margin, and unmistakable across a room. Depending on the cut, a 4 carat diamond measures roughly 10 mm across for a round brilliant, 12 mm long for an oval, 13 mm for a marquise, and about 9 mm for a princess or radiant cut. It sits high on the finger, catches the light from every angle, and photographs beautifully.

At Rêve Diamonds, we design and hand-set every 4 carat diamond ring in our own workshops. Our 4 ct rings are available in classic solitaire, hidden-halo, three-stone, split-shank and bezel settings, in 18k white gold, yellow gold, rose gold and platinum. Choose your diamond first from our inventory of over 200,000 GIA-certified diamonds — lab-grown from around $6,900 and natural from around $28,000 for a 4 ct — and we build the ring around it.

Timeless and Contemporary Designs

The setting is what turns a 4 carat diamond into a ring you want to wear every day. A slim four-claw solitaire keeps the focus entirely on the stone and lets the most light in from underneath, so the diamond reads even larger. A hidden halo tucked under the crown adds sparkle without visual bulk. A three-stone design flanks the centre with two smaller side stones — usually 0.3–0.5 ct pears or trapezoids — for a bold, symmetrical silhouette.

Popular shapes at 4 carats: round brilliant for maximum fire and traditional appeal, oval for a hand-lengthening finger silhouette, emerald and Asscher for a clean, understated Art Deco look, and cushion and elongated cushion for a soft, romantic sparkle. Fancy shapes — marquise, pear, radiant — read even larger than a round of the same weight because their footprint is bigger.

Certified and Ethically Sourced

Every 4 carat diamond we sell — natural or lab-grown — comes with a full GIA or IGI grading report covering the 4Cs: cut, colour, clarity and carat weight. Natural stones are Kimberley Process certified and traceable to origin. Lab-grown 4 ct diamonds are CVD or HPHT, chemically and optically identical to mined diamonds, and typically 60–70% less than a natural of the same specification.

Custom-Made for You

If you can't find the exact 4 carat diamond ring you have in mind, we build bespoke pieces from scratch — book a virtual or in-person appointment and we'll walk through diamond selection, setting design, metal, band width and finish. Turnaround on a bespoke 4 carat ring is typically 2–3 weeks. See our bespoke engagement rings and start-with-a-setting pages for the process.

Book a 1-on-1 Consultation with a Diamond Jewelry Expert in NYC or Beverly Hills

Prefer to see the diamonds in person? Our showrooms in New York City and Beverly Hills stock hundreds of loose 4 carat and near-4 carat diamonds. Appointments are private, no-obligation, and typically last 45–60 minutes. We can also arrange virtual consultations with live diamond viewing on Zoom.

Frequently Asked Questions

How much does a 4 carat diamond ring cost?

A 4 carat lab-grown diamond ring starts from around $6,900 for a round D-VS1 in a plain solitaire setting. Natural 4 carat diamond rings start from around $28,000 for a G-SI1 round, with prices climbing for higher colour, better clarity and fancy shapes. The setting itself typically adds $900–$3,500 depending on metal, diamond count and complexity.

What are the dimensions of a 4 carat diamond in mm?

A round brilliant 4 carat diamond is approximately 10.2 mm in diameter. An oval 4 carat measures roughly 12 × 8 mm, a princess cut is about 8.5 mm square, an emerald cut is around 10 × 8 mm, a cushion 9 × 9 mm, and a pear or marquise around 14 × 8 mm. Fancy shapes appear larger than a round of the same weight.

How big does a 4 carat diamond look on the hand?

A 4 carat diamond covers most of the base of the finger and sits noticeably high in a standard six-claw setting. On average fingers (size 5–6 US), a 4 ct round looks generous and confident without being uncomfortable. On slimmer fingers it reads even larger; on wider fingers it stays balanced.

Is a 4 carat diamond ring too big for an engagement ring?

Not at all — 4 carat engagement rings have become the new benchmark for statement pieces, especially since lab-grown diamonds made this size accessible. Celebrities including Kim Kardashian, Cardi B, Blake Lively and Beyoncé all wear diamonds in the 4–8 ct range. If you plan to wear the ring daily, opt for a low-profile setting to keep it comfortable.

Should I choose lab-grown or natural for a 4 carat ring?

Lab-grown gives you the same look, sparkle and durability at 60–70% less — meaning a 4 carat becomes achievable within a typical engagement-ring budget. Natural diamonds hold their story and rarity, and remain the classic investment choice. Both come with full lab grading and lifetime service from us.

Which cut is most popular for a 4 carat engagement ring?

Round brilliant is still the most requested — it delivers the most fire and works with every setting style. Oval is the fastest-growing choice because it elongates the finger and appears larger than a round of the same weight. Elongated cushion and radiant are close behind for anyone wanting soft brilliance with a modern silhouette.

Do you ship 4 carat diamond rings internationally?

Yes — we ship fully insured, worldwide, at no charge. US orders arrive in 2–4 business days once the ring is finished. All ONLINE orders include a 30-day return window, a lifetime service warranty and a certified diamond grading report.

Can I customise a 4 carat setting?

Every 4 carat ring on our site can be customised: metal (18k white, yellow, rose gold or platinum), band width, claw count, hidden halo, finger size and finish. For a fully bespoke design, book a design consultation and we'll draw a CAD render before we make anything.

4 Carat Diamond Ring | Reve Diamonds