1.8 Carat Lab Grown Diamond Prices Comparison
As of May 2026, the average price of a 1.8 carat lab grown diamond is $1,342.1.8 carat diamonds can cost anywhere from $202 to $9,397 depending on shape, color, clarity, and other factors.In the last 3 months, prices for these diamonds are down 3.9%.Compare 9,664 verified listings across 13 retailers in the tables below.
1.8 Carat Lab Grown Diamond Market Overview
CaratRadar currently tracks 9,664 verified 1.8-carat lab grown diamonds listed across 13 online retailers. Prices in this segment range from $202 to $9,397, with an average asking price of $1,342 and a median of $1,060.
The price spread of $9,195 (97.9% 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.
9,664 diamonds tracked in this segment
Price range: $202 to $9,397
Average price: $1,342
Median price: $1,060
Available across 13 retailers
Savings potential: up to 97.9%
Price Range Overview
As of May 28, 2026Real market range for this carat, shape, and diamond type.
9,664
$202
$1,342
$1,060
$9,397
Price History
Price Comparison Matrix
1.8 Carat Lab Grown 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 44.3%IGI | 1.81ct | Heart | E | VS1 | Ideal
From $202
Compare at $362
Save 66.3%IGI | 1.81ct | Radiant | E | VVS2 | Very Good
From $258
Compare at $765
Save 64.4%IGI | 1.82ct | Radiant | D | VS1 | Very Good
From $260
Compare at $730
Save 49.1%IGI | 1.85ct | Radiant | E | VVS2 | Very Good
From $264
Compare at $518
Save 49.2%IGI | 1.86ct | Radiant | E | VVS2 | Very Good
From $265
Compare at $521
Save 45.8%IGI | 1.85ct | Cushion | E | VS2 | Very Good
From $270
Compare at $499
Save 45.8%IGI | 1.85ct | Cushion | E | VS2 | Very Good
From $270
Compare at $499
Save 46.8%IGI | 1.89ct | Cushion | E | VS2 | Ideal
From $271
Compare at $509
Save 45.9%IGI | 1.88ct | Cushion | E | VS2 | Very Good
From $274
Compare at $507
Save 45.1%IGI | 1.89ct | Cushion | G | VS1 | Very Good
From $275
Compare at $501
Save 46%IGI | 1.89ct | Cushion | E | VS2 | Very Good
From $275
Compare at $509
Save 79.7%IGI | 1.87ct | Cushion | F | VS1 | Very Good
From $277
Compare at $1,365
Save 61.7%IGI | 1.85ct | Emerald | E | VS2 | Ideal
From $278
Compare at $725
Save 45.9%IGI | 1.85ct | Cushion | F | VS1 | Very Good
From $278
Compare at $514
Save 61.5%IGI | 1.81ct | Emerald | E | VS1 | Very Good
From $279
Compare at $724
Save 79.4%IGI | 1.86ct | Cushion | F | VS1 | Ideal
From $279
Compare at $1,355
Save 79.4%IGI | 1.86ct | Cushion | F | VS1 | Excellent
From $279
Compare at $1,355
Save 46.8%IGI | 1.85ct | Cushion | F | VS1 | Very Good
From $286
Compare at $538
Save 65.7%IGI | 1.87ct | Cushion | G | VS1 | Very Good
From $289
Compare at $843
Save 46%IGI | 1.84ct | Cushion | F | VS1 | Very Good
From $289
Compare at $535
Save 77.6%IGI | 1.85ct | Round | F | SI1 | Ideal
From $291
Compare at $1,300
Save 45.9%IGI | 1.85ct | Cushion | E | VS2 | Very Good
From $291
Compare at $538
Save 78.7%IGI | 1.83ct | Princess | H | VS2 | Ideal
From $292
Compare at $1,370
Save 78.3%IGI | 1.89ct | Oval | H | VS1 | Excellent
From $293
Compare at $1,350
Save 78.2%IGI | 1.87ct | Oval | H | VS2 | Very Good
From $294
Compare at $1,350
Save 45.9%IGI | 1.87ct | Cushion | F | VS1 | Ideal
From $294
Compare at $544
Save 68.5%IGI | 1.88ct | Radiant | E | VS2 | Very Good
From $295
Compare at $936
Save 66.5%IGI | 1.86ct | Cushion | G | VVS2 | Very Good
From $297
Compare at $886
Save 67.5%IGI | 1.81ct | Cushion | F | VS1 | Very Good
From $297
Compare at $915
Save 66.3%IGI | 1.82ct | Cushion | E | VS2 | Very Good
From $298
Compare at $885
Save 66.6%IGI | 1.85ct | Cushion | F | VS2 | Very Good
From $299
Compare at $896
Save 79.8%IGI | 1.85ct | Emerald | E | VS1 | Very Good
From $299
Compare at $1,480
Save 71%IGI | 1.88ct | Emerald | I | VS2 | Ideal
From $300
Compare at $1,033
IGI | 1.83ct | Oval | H | VVS2 | Excellent
From $300
Compare at $1,410
Save 78.7%IGI | 1.88ct | Oval | H | VS1 | Excellent
From $300
Compare at $1,410
Save 66.5%IGI | 1.84ct | Cushion | E | VS2 | Very Good
From $302
Compare at $902
Save 67%IGI | 1.87ct | Cushion | F | VS2 | Very Good
From $302
Compare at $914
Save 67.1%IGI | 1.88ct | Cushion | F | VS2 | Very Good
From $304
Compare at $923
Save 66.4%IGI | 1.88ct | Cushion | G | VVS2 | Very Good
From $304
Compare at $905
Save 67.1%IGI | 1.88ct | Cushion | F | VS2 | Very Good
From $304
Compare at $923
Save 68.3%IGI | 1.86ct | Cushion | F | VS1 | Very Good
From $305
Compare at $963
Save 66.4%IGI | 1.81ct | Cushion | E | VS1 | Very Good
From $305
Compare at $909
Save 66.4%IGI | 1.81ct | Cushion | E | VS1 | Very Good
From $305
Compare at $909
Save 67.3%IGI | 1.84ct | Cushion | E | VS1 | Very Good
From $306
Compare at $936
Save 67.2%IGI | 1.89ct | Cushion | F | VS2 | Very Good
From $306
Compare at $932
Save 70.9%IGI | 1.84ct | Cushion | E | VS1 | Very Good
From $306
Compare at $1,052
Save 79.5%IGI | 1.85ct | Oval | H | VVS2 | Very Good
From $308
Compare at $1,500
Save 67.5%IGI | 1.85ct | Cushion | E | VS1 | Very Good
From $308
Compare at $947
Save 67.7%IGI | 1.85ct | Cushion | F | VS1 | Very Good
From $308
Compare at $954
Save 67.2%IGI | 1.88ct | Cushion | E | VS2 | Very Good
From $308
Compare at $939
Entry pricing in this category starts around $202.
What to Know When Shopping for 1.8 Carat Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $9,195 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 $1,060 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.
- Lab-grown diamonds offer excellent value. Ensure the stone comes with a GIA or IGI certificate confirming it is laboratory-grown.
- 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 9,664 comparable stones in this segment. Prices start around $202 and go up to $9,397.
Based on the latest market data, the average asking price is about $1,342 with a median around $1,060.
The observed spread is roughly $9,195 across tracked listings, which is about 97.9% 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 $1,342. The median price is $1,060, 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 13 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 $9,195 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 Lab Grown Diamond Prices
1.8 Carat Oval Lab Grown Diamond Prices
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1.8 Carat Cushion Lab Grown Diamond Prices
1.8 Carat Princess Lab Grown Diamond Prices
1.8 Carat Radiant Lab Grown Diamond Prices
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