4 Carat Natural Diamond Engagement Rings

What the Stone in a 4 Carat Natural Diamond Engagement Ring Costs

For a 4 carat natural ring the setting is a small part of the total. The six settings in the table cost $605 to $1,385 in 14K white gold, and most natural stones from 3.90 to 4.10 carats cost $28,400 to $95,600, with the median at $52,200. Most finished rings come to about $29,000 to $96,900, and the same designs with a lab grown center to about $3,500 to $7,660. For more choice, the full catalog of 691 settings runs from $480 to $5,195.

Complete 4 carat engagement ring prices by setting, October 21, 2026: the setting price plus the middle half of 3.90 to 4.10 ct center stone prices (25th to 75th percentile, all shapes)

In the 3.90 to 4.10 carat band Rare Carat has 1,668 natural diamonds in stock today, 1,341 of them with 360 HD video, and any one of them can be set in the 670 or more 4 carat natural diamond engagement ring designs on this page. The lowest priced stone in the band is $13,150 after the current savings and the median is $52,325. A 4 carat natural round, the shape most of the designs are pictured with, begins at $16,400 and has a median of $51,388. Shown today with a 4.05 carat natural round in 14K white gold, the Linda comfort fit solitaire comes to $69,360 as a complete 4 carat engagement ring, the Vivian solitaire to $69,690 and the Bellora hidden halo to $70,140, stone included in each case. All of these figures were pulled from inventory on October 16, 2026 and are refreshed as the stock changes.

The stone in a 4 carat diamond engagement ring is rare enough that each shape's natural inventory runs to dozens or a few hundred pieces, never thousands, and the pricing follows from that scarcity. The designs here are pictured with a round natural stone of this size; the shape table that follows tells you as much about what exists as about what it costs.

Shape by Shape: Natural Stones at This Weight

The table below divides the 1,668 natural stones in the band by shape, so the rows sum to the headline count. Rounds account for 558 of them at a $51,388 median, and ovals, the second deepest row, for 265. Comparing medians, the princess is the least expensive shape here, at $37,215, and the marquise the most expensive, at $64,236. Because ovals, pears and marquises face up larger than a round of equal weight, a 4 carat stone in one of those shapes covers more of the finger; at the median the oval also costs a little less than the round, the pear about the same and the marquise more. Every shape name in the table is a link to its own natural ring page, where these same designs are pictured with a stone of that shape and size.

1,668 natural stones at 4 carats (3.90 to 4.10 ct), split by shape, today's prices as of October 16, 2026

Below and Above the 4 Carat Mark

Within the band, only 52 natural stones weigh between 3.90 and 3.99 carats, and their median is $48,410. The 4.00 to 4.10 side holds 1,616 at a median of $52,254. A grade for grade comparison across the two sides would not mean much when one side is that thin, so the number to take from this table is the count itself. At this size you are buying a single stone from what happens to exist, and the shape table above tells you where that stock sits.

All shapes, natural, either side of 4 carats, October 16, 2026

Color and Clarity in a Natural Round at Four Carats

In a 4 carat natural round each grade step is a large sum. Holding clarity at VS2, the starting price is $65,100 in D color, $48,180 in G, $44,505 in H and $34,415 in I. If color is held at G to H instead, VS1 begins at $46,945, VS2 at $44,505 and SI1 at $44,305. The usual choice is G to H color with VS2 to SI1 clarity, checked on the video of the specific stone. Go one color grade warmer when the setting will be yellow or rose gold.

Starting prices for natural rounds at 4 carats (3.90 to 4.10 ct): by color with clarity held at VS2 (95 stones), and by clarity with color held at G to H (148 stones)

Natural or Lab Grown: the Price Gap at Four Carats

A round of 4 carats in G color and VS1 clarity begins at $46,945 when it is natural and at $2,555 when it is lab grown. Medians across every shape are $52,325 against $3,668, and the lab grown band is far deeper at 55,883 stones to 1,668 natural. The lab stone gives you the same face up size for a fraction of the price, while the natural stone is the scarce one, and 1,391 of the 1,668 natural stones in the band carry GIA reports. To see these designs priced with the lab stone instead, open the 4 carat lab grown diamond engagement rings page.

Natural against lab grown, rounds of 3.90 to 4.10 ct at one grade (October 16, 2026)

Settings Built to Hold a Stone This Size

With this much weight on top, the setting is a structural matter whether the stone is natural or lab grown. Look for a band of 2.5 mm or wider, six or eight prongs or a full bezel, a gallery underneath that carries the stone, and shoulders that stop it rotating. Elongated shapes sit lower in the mounting and wear more easily than a round at this weight, and a natural stone this heavy earns the extra protection. Sizing matters more than usual too, since a 4 carat engagement ring with a heavy head will turn on a band that is even slightly loose.

Seen from above, a round of 4 carats runs about 10.2 to 10.4 mm across, an oval roughly 12.5 x 9.5 mm, an emerald cut 10.5 x 8 mm and a cushion 9.5 to 10 mm. That is why the longer shapes look bigger at the same weight, and why a natural oval or pear of this size on a narrow band gives the largest looking ring for the money. Each design is pictured here as a 4 carat diamond engagement ring with a natural round in 14K white gold. Every one is also made in yellow gold, rose gold or platinum around whichever stone you pick. Our gemologists, who are paid no commission, can be reached by chat or phone and will go through two or three 4 carat candidates with you on video.

Today's Price for a Complete 4 Carat Natural Diamond Engagement Ring

Every price in the grid is for a finished ring, setting and center together. The default center at the moment is a 4.05 carat natural round in 14K white gold, so the table below reads in ring prices rather than stone prices. Among the first designs on the page the spread runs from $69,360 for the Linda comfort fit solitaire up to $70,140 for the Bellora hidden halo. Setting choice accounts for the gap between those two, and stone origin accounts for the gap between this page and the lab grown one. Choose any of the 1,668 natural diamonds in the band and the 4 carat natural diamond engagement ring you are looking at is repriced around that stone.

Complete 4 carat engagement ring prices as pictured on the page, natural center included, 14K white gold (October 17, 2026)

Checkout and After: Buying a Natural 4 Carat Diamond Engagement Ring Here

Rare Carat is a direct retailer and the merchant of record on every order. Any of the more than 2 million diamonds it carries, natural and lab grown, can go into these designs. After the order is placed, our New York staff put the chosen stone under a microscope and confirm that the inscription matches the grading report before anything ships. Insured shipping is free from there, returns are free for 30 days, resizing is free during the first year, and the setting carries a lifetime manufacturing warranty. If you would rather pay over time, Katapult, Affirm, Klarna, Afterpay and PayPal Pay Later are all offered at checkout. Rare Carat is rated 5 out of 5 on both Google and Trustpilot, and it is Trustpilot's highest rated jewelry brand in America.

Stone counts and stone prices on this page describe every natural diamond weighing 3.90 to 4.10 carats that Rare Carat had in inventory on October 16, 2026. The filter is the one the diamond grids use: with or without video, color D to K, clarity FL to SI2, cut grade Good or better, and a GIA, IGI or GCAL report. That gives 1,668 natural stones, 1,341 of them with 360 HD video, alongside 55,883 lab grown stones used for the comparison. Each stone price is what you would pay today once the current savings are taken off, and the regular price appears struck through on the stone itself. Where a starting price is quoted it is the least expensive stone in that row, whatever its grade or weight. Ring prices are the ones displayed on the page on October 17, 2026 for complete rings in 14K white gold with the named center stone included. The design count is the one the page itself reports. The color and clarity ladders and the natural against lab grown table are built from rounds in the band, so that the price changes with grade and not with shape.