1.8 Carat Round Natural Diamond Prices Comparison
As of May 2026, 1.8 carat round natural diamonds usually range from $978 to $38,904, with an average price of $14,478.In the last month, prices for these diamonds are up 1%.Compare 478 verified listings across 9 retailers tracked by CaratRadar.
1.8 Carat Round Natural Diamond Market Overview
CaratRadar currently tracks 478 verified 1.8-carat round natural diamonds listed across 9 online retailers. Prices in this segment range from $978 to $38,904, with an average asking price of $14,478 and a median of $13,352.
The price spread of $37,926 (97.5% from highest to lowest) highlights why comparing identical certified diamonds across multiple retailers matters. Two identical certified diamonds can differ by hundreds or even thousands of dollars depending on the retailer.
These figures are based on our latest daily market data, matched by certification lab and certificate number across retailers, so you are comparing the exact same diamond.
478 diamonds tracked in this segment
Price range: $978 to $38,904
Average price: $14,478
Median price: $13,352
Available across 9 retailers
Savings potential: up to 97.5%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
478
$978
$14,478
$13,352
$38,904
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
Save 20.2%IGI | 1.82ct | Round | K | SI1 | Excellent
From $2,995
Compare at $3,755
Save 25.2%GIA | 1.81ct | Round | L | SI1 | Ideal
From $3,136
Compare at $4,194
Save 41.3%GIA | 1.82ct | Round | L | SI1 | Ideal
From $3,153
Compare at $5,372
Save 25.2%GIA | 1.81ct | Round | L | SI2 | Excellent
From $3,426
Compare at $4,579
Save 18.3%IGI | 1.81ct | Round | J | SI1 | Excellent
From $3,430
Compare at $4,201
Save 12.4%GIA | 1.82ct | Round | K | SI2 | Excellent
From $3,696
Compare at $4,220
Save 41.3%GIA | 1.81ct | Round | L | SI2 | Excellent
From $3,837
Compare at $6,536
Save 18.6%GIA | 1.81ct | Round | L | SI1 | Excellent
From $4,032
Compare at $4,956
Save 13.9%IGI | 1.81ct | Round | K | VS2 | Ideal
From $4,135
Compare at $4,803
Save 23.5%GIA | 1.81ct | Round | K | SI2 | Excellent
From $4,254
Compare at $5,557
Save 21.8%GIA | 1.81ct | Round | L | SI1 | Excellent
From $4,291
Compare at $5,486
Save 16.5%GIA | 1.81ct | Round | K | SI1 | Ideal
From $4,417
Compare at $5,292
Save 35.6%GIA | 1.81ct | Round | K | SI1 | Ideal
From $4,427
Compare at $6,879
Save 37%GIA | 1.81ct | Round | K | SI1 | Excellent
From $4,560
Compare at $7,236
Save 41%GIA | 1.85ct | Round | K | SI2 | Excellent
From $4,583
Compare at $7,763
Save 18.1%GIA | 1.81ct | Round | K | SI2 | Excellent
From $4,683
Compare at $5,716
Save 16.9%IGI | 1.84ct | Round | J | VS2 | Excellent
From $4,815
Compare at $5,794
Save 26.5%GIA | 1.81ct | Round | K | SI1 | Ideal
From $4,918
Compare at $6,690
Save 10.6%GIA | 1.82ct | Round | L | SI2 | Excellent
From $4,967
Compare at $5,559
Save 12.4%IGI | 1.85ct | Round | K | VS1 | Excellent
From $4,980
Compare at $5,685
Save 21.7%GIA | 1.82ct | Round | K | SI1 | Ideal
From $5,008
Compare at $6,396
Save 42.2%GIA | 1.88ct | Round | K | SI1 | Excellent
From $5,069
Compare at $8,771
Save 40.9%GIA | 1.81ct | Round | K | VS2 | Ideal
From $5,074
Compare at $8,592
Save 28.6%GIA | 1.87ct | Round | L | VS1 | Ideal
From $5,081
Compare at $7,113
Save 21.7%GIA | 1.83ct | Round | L | SI1 | Excellent
From $5,098
Compare at $6,515
Save 15.3%GIA | 1.83ct | Round | K | SI2 | Excellent
From $5,169
Compare at $6,105
Save 12.8%GIA | 1.81ct | Round | H | SI2 | Excellent
From $5,236
Compare at $6,004
Save 11%IGI | 1.81ct | Round | K | VVS1 | Very Good
From $5,440
Compare at $6,115
Save 37%GIA | 1.82ct | Round | K | SI1 | Ideal
From $5,470
Compare at $8,680
Save 33.3%GIA | 1.81ct | Round | L | VS2 | Excellent
From $5,515
Compare at $8,270
Save 12.2%GIA | 1.81ct | Round | K | SI2 | Excellent
From $5,575
Compare at $6,347
Save 23.3%GIA | 1.82ct | Round | K | SI2 | Excellent
From $5,715
Compare at $7,450
Save 19.1%GIA | 1.81ct | Round | J | SI2 | Excellent
From $5,724
Compare at $7,076
Save 17.8%GIA | 1.85ct | Round | J | SI2 | Ideal
From $5,775
Compare at $7,030
GIA | 1.84ct | Round | L | VS2 | Excellent
From $5,804
Compare at $6,330
Save 14.8%IGI | 1.81ct | Round | J | VS1 | Excellent
From $5,890
Compare at $6,912
Save 21.1%IGI | 1.83ct | Round | I | SI1 | Excellent
From $5,892
Compare at $7,466
Save 36.3%GIA | 1.81ct | Round | K | VS2 | Excellent
From $5,915
Compare at $9,285
Save 15.7%IGI | 1.81ct | Round | J | VS1 | Excellent
From $5,955
Compare at $7,065
Save 21.1%GIA | 1.81ct | Round | J | SI1 | Very Good
From $5,987
Compare at $7,587
Save 15.7%IGI | 1.83ct | Round | J | VVS2 | Excellent
From $6,115
Compare at $7,253
Save 15.3%IGI | 1.82ct | Round | F | SI2 | Ideal
From $6,127
Compare at $7,230
Save 24.3%GIA | 1.84ct | Round | L | VS2 | Excellent
From $6,197
Compare at $8,192
Save 12.5%IGI | 1.81ct | Round | I | IF | Excellent
From $6,200
Compare at $7,085
Save 15.7%IGI | 1.81ct | Round | J | IF | Excellent
From $6,205
Compare at $7,364
Save 11.1%GIA | 1.87ct | Round | L | VS1 | Very Good
From $6,244
Compare at $7,025
Save 37.5%GIA | 1.83ct | Round | I | SI2 | Ideal
From $6,301
Compare at $10,076
Save 14%IGI | 1.81ct | Round | J | VVS1 | Excellent
From $6,365
Compare at $7,402
Save 26.8%GIA | 1.81ct | Round | J | VS2 | Ideal
From $6,371
Compare at $8,699
Save 25.2%GIA | 1.85ct | Round | J | VS2 | Excellent
From $6,392
Compare at $8,542
Entry pricing in this category starts around $978.
What to Know When Shopping for 1.8 Carat Round Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $37,926 or more.
- Focus on the 4Cs that matter most to you. Color and clarity grades drive price more than cut in many segments, but cut affects sparkle the most.
- The median price of $13,352 is a useful benchmark. If you see a deal significantly below this, verify the retailer's reputation and return policy.
- Consider eye-clean alternatives. Moving one clarity grade down (e.g., VS2 to SI1) can save 10-15% with no visible difference to the naked eye.
- Compare natural vs. lab-grown options for the same carat and shape. Lab-grown diamonds are chemically identical but often 30-50% less expensive.
- Check shipping, insurance, and return policies. The lowest sticker price is not always the best deal once you factor in total cost of purchase.
- Round brilliants command a premium due to higher rough waste during cutting. If budget matters, consider oval or cushion shapes for similar visual size.
Frequently Asked Questions
We currently track 478 comparable stones in this segment. Prices start around $978 and go up to $38,904.
Based on the latest market data, the average asking price is about $14,478 with a median around $13,352.
The observed spread is roughly $37,926 across tracked listings, which is about 97.5% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $14,478. The median price is $13,352, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
We currently track this stone category across 9 online retailers, giving you a broad view of the competitive landscape.
For most buyers, color differences below G are hard to detect once set in a ring. Clarity grades of VS2 and above are typically eye-clean. Prioritize cut quality for maximum brilliance, then balance color and clarity based on your budget.
Retailer pricing strategies, overhead costs, and margin targets all contribute. The exact certified diamond can differ by $37,926 across sellers, which is why direct certified-diamond comparison is essential.
We match diamonds across retailers by their certification lab and certificate number. This means the prices you see are for the exact same physical diamond, not just stones with similar specs. It is a true apples-to-apples comparison.
Diamond prices fluctuate based on supply and demand. Our data refreshes regularly so you can track trends over time. Use the price range on this page as a benchmark and compare it to historical averages when available.
Diamond Terminology
- Carat
- A unit of weight for diamonds equal to 200 milligrams. Larger carat weights are exponentially rarer, which is why prices increase non-linearly with size.
- Cut
- Refers to how well a diamond's facets interact with light. Cut quality ranges from Ideal to Poor and is the single biggest factor affecting a diamond's brilliance.
- Color
- Grades a diamond's lack of color on a scale from D (colorless) to Z (light yellow). Grades D-F are considered colorless; G-J are near-colorless and offer good value.
- Clarity
- Measures the presence of internal inclusions or surface blemishes. Grades range from Flawless (FL) to Included (I3). Most inclusions in VS2 and above are invisible to the naked eye.
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Tracking Natural inventory for 1.8 carat Round diamonds.