1.8 Carat Natural Diamond Prices Comparison
As of July 2026, the average price of a 1.8 carat natural diamond is $13,238.1.8 carat diamonds can cost anywhere from $552 to $40,934 depending on shape, color, clarity, and other factors.In the last month, prices for these diamonds are down 0.4%.Compare 959 verified listings across 10 retailers in the tables below.
1.8 Carat Natural Diamond Market Overview
CaratRadar currently tracks 959 verified 1.8-carat natural diamonds listed across 10 online retailers. Prices in this segment range from $552 to $40,934, with an average asking price of $13,238 and a median of $12,452.
The price spread of $40,382 (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.
959 diamonds tracked in this segment
Price range: $552 to $40,934
Average price: $13,238
Median price: $12,452
Available across 10 retailers
Savings potential: up to 98.7%
Price Range Overview
As of Jul 13, 2026Real market range for this carat, shape, and diamond type.
959
$552
$13,238
$12,452
$40,934
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.
IGI | 1.87ct | Round | L | SI2 | Ideal
From $1,820
Compare at $1,836
GIA | 1.83ct | Cushion | L | SI2 | Excellent
From $2,632
Compare at $2,670
GIA | 1.81ct | Cushion | K | SI1 | Excellent
From $2,643
Compare at $2,892
IGI | 1.82ct | Round | K | SI1 | Excellent
From $2,723
Compare at $2,770
Save 40.3%GIA | 1.82ct | Cushion | J | SI2 | Excellent
From $2,905
Compare at $4,866
Save 36.9%GIA | 1.85ct | Cushion | K | SI1 | Very Good
From $2,979
Compare at $4,724
IGI | 1.81ct | Heart | H | SI2 | Ideal
From $3,083
Compare at $3,331
IGI | 1.83ct | Heart | I | SI2 | Ideal
From $3,213
Compare at $3,433
Save 36.3%GIA | 1.81ct | Round | L | SI1 | Excellent
From $3,231
Compare at $5,074
Save 19.7%GIA | 1.81ct | Cushion | J | SI1 | Excellent
From $3,253
Compare at $4,053
IGI | 1.81ct | Round | I | SI2 | Excellent
From $3,274
Compare at $3,498
Save 38.7%GIA | 1.85ct | Pear | L | SI1 | Good
From $3,325
Compare at $5,423
Save 36.6%GIA | 1.82ct | Round | L | SI1 | Ideal
From $3,421
Compare at $5,398
Save 15.8%GIA | 1.81ct | Princess | K | VS2 | Excellent
From $3,465
Compare at $4,113
Save 36.5%GIA | 1.82ct | Round | K | SI2 | Excellent
From $3,486
Compare at $5,492
IGI | 1.81ct | Emerald | K | VS2 | Very Good
From $3,496
Compare at $3,500
Save 40.7%GIA | 1.83ct | Cushion | I | VS1 | Ideal
From $3,640
Compare at $6,138
IGI | 1.83ct | Pear | K | VS2 | Very Good
From $3,668
Compare at $3,670
Save 42.9%GIA | 1.81ct | Round | L | SI2 | Excellent
From $3,700
Compare at $6,484
Save 23.2%GIA | 1.85ct | Asscher | J | SI2 | Ideal
From $3,719
Compare at $4,840
Save 12.1%GIA | 1.85ct | Emerald | L | VS2 | Very Good
From $3,879
Compare at $4,413
Save 35.8%GIA | 1.81ct | Oval | L | VS1 | Excellent
From $3,924
Compare at $6,116
Save 23.7%GIA | 1.81ct | Cushion | H | SI2 | Excellent
From $3,977
Compare at $5,210
Save 40.3%GIA | 1.81ct | Asscher | J | VS1 | Ideal
From $3,983
Compare at $6,668
IGI | 1.81ct | Heart | E | SI2 | Ideal
From $3,986
Compare at $4,077
Save 37%GIA | 1.81ct | Radiant | L | VVS2 | Excellent
From $4,023
Compare at $6,387
Save 37.7%GIA | 1.81ct | Princess | J | SI1 | Ideal
From $4,126
Compare at $6,624
Save 17.9%GIA | 1.84ct | Princess | H | SI2 | Very Good
From $4,146
Compare at $5,047
GIA | 1.85ct | Radiant | K | VS2 | Excellent
From $4,171
Compare at $4,451
Save 16.9%GIA | 1.82ct | Asscher | J | SI1 | Excellent
From $4,196
Compare at $5,050
Save 10.3%GIA | 1.82ct | Princess | J | VS1 | Excellent
From $4,219
Compare at $4,704
IGI | 1.81ct | Oval | K | VVS2 | Very Good
From $4,243
Compare at $4,245
GIA | 1.82ct | Round | L | SI2 | Excellent
From $4,264
Compare at $4,512
Save 32%GIA | 1.81ct | Emerald | L | VS2 | Very Good
From $4,299
Compare at $6,321
Save 10.9%GIA | 1.81ct | Round | K | SI1 | Ideal
From $4,320
Compare at $4,850
Save 31.7%GIA | 1.81ct | Emerald | K | VS1 | Excellent
From $4,365
Compare at $6,392
GIA | 1.81ct | Emerald | L | VVS1 | Excellent
From $4,388
Compare at $4,812
IGI | 1.82ct | Oval | G | SI2 | Ideal
From $4,403
Compare at $4,504
Save 13.7%GIA | 1.86ct | Princess | J | VS2 | Good
From $4,408
Compare at $5,107
Save 40.9%GIA | 1.85ct | Round | K | SI2 | Excellent
From $4,427
Compare at $7,492
Save 39.2%GIA | 1.83ct | Round | K | SI1 | Excellent
From $4,448
Compare at $7,319
GIA | 1.81ct | Asscher | K | VS2 | Ideal
From $4,453
Compare at $4,839
IGI | 1.82ct | Oval | I | SI2 | Ideal
From $4,570
Compare at $4,813
Save 24.7%GIA | 1.81ct | Round | K | SI1 | Ideal
From $4,590
Compare at $6,093
Save 37.2%GIA | 1.81ct | Oval | K | SI1 | Ideal
From $4,601
Compare at $7,327
GIA | 1.84ct | Princess | J | VS2 | Ideal
From $4,611
Compare at $4,995
IGI | 1.85ct | Round | K | VS1 | Excellent
From $4,633
Compare at $4,635
Save 37.2%GIA | 1.81ct | Emerald | K | VS2 | Excellent
From $4,638
Compare at $7,385
GIA | 1.83ct | Princess | J | VS1 | Excellent
From $4,657
Compare at $5,014
GIA | 1.82ct | Princess | J | VS1 | Excellent
From $4,692
Compare at $5,048
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 $40,382 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 $12,452 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 959 comparable stones in this segment. Prices start around $552 and go up to $40,934.
Based on the latest market data, the average asking price is about $13,238 with a median around $12,452.
The observed spread is roughly $40,382 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 $13,238. The median price is $12,452, 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 $40,382 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
1.8 Carat Emerald Natural Diamond Prices
1.8 Carat Princess Natural Diamond Prices
1.8 Carat Pear Natural Diamond Prices
1.8 Carat Asscher Natural Diamond Prices
1.8 Carat Heart Natural Diamond Prices
1.8 Carat Radiant Natural Diamond Prices
1.8 Carat Marquise Natural Diamond Prices
Tracking Natural inventory for 1.8 carat all-shape diamonds.