1.8 Carat Natural Diamond Prices Comparison
As of May 2026, the average price of a 1.8 carat natural diamond is $13,386.1.8 carat diamonds can cost anywhere from $552 to $43,369 depending on shape, color, clarity, and other factors.In the last month, prices for these diamonds are up 0.6%.Compare 1,173 verified listings across 10 retailers in the tables below.
1.8 Carat Natural Diamond Market Overview
CaratRadar currently tracks 1,173 verified 1.8-carat natural diamonds listed across 10 online retailers. Prices in this segment range from $552 to $43,369, with an average asking price of $13,386 and a median of $12,608.
The price spread of $42,816 (98.7% 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.
1,173 diamonds tracked in this segment
Price range: $552 to $43,369
Average price: $13,386
Median price: $12,608
Available across 10 retailers
Savings potential: up to 98.7%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
1,173
$552
$13,386
$12,608
$43,369
Price History
Price Comparison Matrix
1.8 Carat Natural Diamond Prices by Shape
Shape-level averages for this carat and type. Open each shape page for full market detail.
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
Save 29.9%GIA | 1.81ct | Cushion | K | SI1 | Excellent
From $2,891
Compare at $4,125
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 15.3%IGI | 1.82ct | Emerald | K | VS2 | Ideal
From $3,200
Compare at $3,779
Save 41.5%GIA | 1.82ct | Cushion | J | SI2 | Excellent
From $3,279
Compare at $5,606
IGI | 1.87ct | Princess | K | VS2 | Very Good
From $3,335
Compare at $3,492
Save 20.5%IGI | 1.81ct | Emerald | K | VS1 | Ideal
From $3,335
Compare at $4,193
Save 15.7%IGI | 1.81ct | Emerald | K | VVS1 | Very Good
From $3,395
Compare at $4,028
Save 27%GIA | 1.81ct | Princess | K | VS2 | Excellent
From $3,415
Compare at $4,677
Save 25.2%GIA | 1.81ct | Round | L | SI2 | Excellent
From $3,426
Compare at $4,579
Save 19.7%IGI | 1.86ct | Pear | K | VS2 | Very Good
From $3,430
Compare at $4,272
Save 18.3%IGI | 1.81ct | Round | J | SI1 | Excellent
From $3,430
Compare at $4,201
Save 26.9%GIA | 1.85ct | Cushion | K | SI1 | Very Good
From $3,452
Compare at $4,724
HRD | 1.81ct | Cushion | J | SI1 | Ideal
From $3,510
Compare at $3,542
IGI | 1.83ct | Emerald | K | VS1 | Ideal
From $3,635
Compare at $3,984
Save 36.3%GIA | 1.85ct | Pear | L | SI1 | Good
From $3,668
Compare at $5,760
Save 12.4%GIA | 1.82ct | Round | K | SI2 | Excellent
From $3,696
Compare at $4,220
Save 14.7%IGI | 1.81ct | Emerald | K | VVS1 | Ideal
From $3,720
Compare at $4,362
Save 19.7%IGI | 1.82ct | Oval | K | VVS2 | Very Good
From $3,730
Compare at $4,646
Save 33.7%IGI | 1.81ct | Emerald | K | VS2 | Very Good
From $3,780
Compare at $5,699
Save 14.8%IGI | 1.81ct | Oval | K | VVS1 | Ideal
From $3,830
Compare at $4,497
Save 41.3%GIA | 1.81ct | Round | L | SI2 | Excellent
From $3,837
Compare at $6,536
Save 13.1%IGI | 1.82ct | Pear | K | VVS2 | Ideal
From $3,875
Compare at $4,461
Save 23.9%GIA | 1.81ct | Cushion | J | SI1 | Excellent
From $3,900
Compare at $5,127
Save 18.6%GIA | 1.81ct | Round | L | SI1 | Excellent
From $4,032
Compare at $4,956
Save 11.5%IGI | 1.81ct | Oval | K | VVS2 | Very Good
From $4,095
Compare at $4,626
GIA | 1.81ct | Princess | L | SI2 | Excellent
From $4,106
Compare at $4,269
Save 13.9%IGI | 1.81ct | Round | K | VS2 | Ideal
From $4,135
Compare at $4,803
Save 39.2%GIA | 1.83ct | Cushion | I | VS1 | Ideal
From $4,158
Compare at $6,839
Save 14.5%GIA | 1.82ct | Princess | I | SI2 | Excellent
From $4,172
Compare at $4,878
IGI | 1.81ct | Emerald | K | IF | Very Good
From $4,175
Compare at $4,546
Save 23.5%GIA | 1.81ct | Round | K | SI2 | Excellent
From $4,254
Compare at $5,557
Save 39.8%GIA | 1.81ct | Cushion | J | IF | Ideal
From $4,256
Compare at $7,072
Save 21.8%GIA | 1.81ct | Round | L | SI1 | Excellent
From $4,291
Compare at $5,486
Save 24.8%GIA | 1.81ct | Emerald | K | VS1 | Very Good
From $4,332
Compare at $5,757
Save 32.4%GIA | 1.81ct | Radiant | K | SI1 | Excellent
From $4,343
Compare at $6,421
Save 19.9%GIA | 1.85ct | Radiant | K | VS2 | Excellent
From $4,403
Compare at $5,500
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 24.3%GIA | 1.84ct | Princess | H | SI2 | Very Good
From $4,428
Compare at $5,852
HRD | 1.81ct | Cushion | I | VS2 | Excellent
From $4,480
Compare at $4,626
Save 20.2%IGI | 1.81ct | Princess | I | VVS1 | Very Good
From $4,495
Compare at $5,630
GIA | 1.82ct | Princess | J | VS1 | Excellent
From $4,513
Compare at $4,865
Save 10.8%GIA | 1.85ct | Emerald | L | VS2 | Very Good
From $4,557
Compare at $5,112
Save 22.3%GIA | 1.83ct | Radiant | K | SI1 | Excellent
From $4,558
Compare at $5,864
Save 37%GIA | 1.81ct | Round | K | SI1 | Excellent
From $4,560
Compare at $7,236
Save 24%IGI | 1.83ct | Pear | I | SI1 | Very Good
From $4,569
Compare at $6,014
Save 24%IGI | 1.83ct | Pear | I | SI1 | Very Good
From $4,569
Compare at $6,014
Save 41%GIA | 1.85ct | Round | K | SI2 | Excellent
From $4,583
Compare at $7,763
Entry pricing in this category starts around $552.
What to Know When Shopping for 1.8 Carat Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $42,816 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 $12,608 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.
Frequently Asked Questions
We currently track 1,173 comparable stones in this segment. Prices start around $552 and go up to $43,369.
Based on the latest market data, the average asking price is about $13,386 with a median around $12,608.
The observed spread is roughly $42,816 across tracked listings, which is about 98.7% 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 $13,386. The median price is $12,608, 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 10 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 $42,816 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
1.8 Carat Round Natural Diamond Prices
1.8 Carat Oval Natural Diamond Prices
1.8 Carat Cushion Natural Diamond Prices
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1.8 Carat Pear Natural Diamond Prices
1.8 Carat Princess Natural Diamond Prices
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