1.8 Carat Round Lab Grown Diamond Prices Comparison
As of May 2026, 1.8 carat round lab grown diamonds usually range from $290 to $7,712, with an average price of $1,356.In the last month, prices for these diamonds are down 2.8%.Compare 3,983 verified listings across 11 retailers tracked by CaratRadar.
1.8 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 3,983 verified 1.8-carat round lab grown diamonds listed across 11 online retailers. Prices in this segment range from $290 to $7,712, with an average asking price of $1,356 and a median of $1,130.
The price spread of $7,422 (96.2% 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.
3,983 diamonds tracked in this segment
Price range: $290 to $7,712
Average price: $1,356
Median price: $1,130
Available across 11 retailers
Savings potential: up to 96.2%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
3,983
$290
$1,356
$1,130
$7,712
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 79.9%IGI | 1.82ct | Round | E | SI1 | Ideal
From $290
Compare at $1,440
Save 77.6%IGI | 1.85ct | Round | F | SI1 | Ideal
From $291
Compare at $1,300
Save 74.7%IGI | 1.81ct | Round | H | VS1 | Excellent
From $309
Compare at $1,220
Save 79.4%IGI | 1.81ct | Round | G | VS2 | Excellent
From $326
Compare at $1,580
Save 68.7%IGI | 1.86ct | Round | F | VS1 | Excellent
From $326
Compare at $1,042
Save 68.7%IGI | 1.89ct | Round | G | VS1 | Excellent
From $328
Compare at $1,048
IGI | 1.86ct | Round | F | VS2 | Excellent
From $331
Compare at $1,550
Save 66.3%IGI | 1.82ct | Round | E | VS1 | Excellent
From $332
Compare at $985
Save 66.3%IGI | 1.82ct | Round | E | VS1 | Ideal
From $332
Compare at $984
Save 67%IGI | 1.85ct | Round | G | VS1 | Excellent
From $333
Compare at $1,010
Save 73.2%IGI | 1.86ct | Round | H | VS1 | Excellent
From $335
Compare at $1,250
Save 79.8%IGI | 1.81ct | Round | F | VS2 | Ideal
From $335
Compare at $1,660
Save 64.6%IGI | 1.82ct | Round | E | VS2 | Ideal
From $336
Compare at $949
Save 68.1%IGI | 1.89ct | Round | E | VS1 | Ideal
From $336
Compare at $1,054
Save 68.7%IGI | 1.89ct | Round | F | VS1 | Ideal
From $336
Compare at $1,074
Save 70.9%IGI | 1.84ct | Round | G | VS1 | Ideal
From $340
Compare at $1,169
Save 65.8%IGI | 1.83ct | Round | E | VS1 | Ideal
From $341
Compare at $997
Save 78.1%IGI | 1.81ct | Round | E | VS2 | Excellent
From $341
Compare at $1,560
Save 76.7%IGI | 1.88ct | Round | H | VVS2 | Ideal
From $343
Compare at $1,470
Save 79.3%IGI | 1.84ct | Round | E | VS2 | Excellent
From $343
Compare at $1,660
Save 77%IGI | 1.81ct | Round | E | VS2 | Excellent
From $343
Compare at $1,490
Save 62.8%IGI | 1.84ct | Round | F | SI1 | Ideal
From $343
Compare at $923
Save 71.4%IGI | 1.84ct | Round | F | VS2 | Ideal
From $343
Compare at $1,198
Save 63.9%IGI | 1.81ct | Round | FANCY | SI1 | Ideal
From $344
Compare at $952
Save 64.5%IGI | 1.84ct | Round | FANCY | SI1 | Good
From $344
Compare at $968
Save 71.5%IGI | 1.85ct | Round | D | VS2 | Ideal
From $344
Compare at $1,205
Save 74.3%IGI | 1.89ct | Round | H | VS1 | Excellent
From $345
Compare at $1,340
Save 67.4%IGI | 1.89ct | Round | E | VS1 | Excellent
From $346
Compare at $1,060
Save 40.6%IGI | 1.82ct | Round | E | VS1 | Ideal
From $347
Compare at $584
Save 76.5%IGI | 1.89ct | Round | E | VS2 | Ideal
From $348
Compare at $1,480
Save 71.4%IGI | 1.81ct | Round | E | VS1 | Excellent
From $349
Compare at $1,222
Save 71.4%IGI | 1.81ct | Round | E | VS1 | Ideal
From $349
Compare at $1,222
Save 71.4%IGI | 1.81ct | Round | E | VS1 | Ideal
From $349
Compare at $1,222
Save 75.2%IGI | 1.85ct | Round | F | VS1 | Excellent
From $349
Compare at $1,405
Save 64.7%IGI | 1.81ct | Round | D | VS1 | Excellent
From $350
Compare at $991
Save 71.4%IGI | 1.82ct | Round | E | VS1 | Ideal
From $351
Compare at $1,229
Save 66%IGI | 1.82ct | Round | G | VVS2 | Excellent
From $351
Compare at $1,031
Save 71.4%IGI | 1.86ct | Round | E | VS1 | Ideal
From $351
Compare at $1,226
Save 76.8%IGI | 1.82ct | Round | E | VS1 | Excellent
From $351
Compare at $1,510
Save 71.4%IGI | 1.82ct | Round | E | VS1 | Ideal
From $351
Compare at $1,229
Save 75.1%IGI | 1.87ct | Round | F | VS1 | Ideal
From $353
Compare at $1,420
Save 74.1%IGI | 1.87ct | Round | F | VS1 | Ideal
From $353
Compare at $1,365
Save 65.4%IGI | 1.81ct | Round | G | VVS2 | Excellent
From $354
Compare at $1,022
Save 71.3%IGI | 1.83ct | Round | E | VS1 | Ideal
From $354
Compare at $1,235
Save 71.4%IGI | 1.88ct | Round | E | VS1 | Excellent
From $354
Compare at $1,239
Save 76.4%IGI | 1.81ct | Round | E | VS1 | Ideal
From $354
Compare at $1,500
Save 69.1%IGI | 1.86ct | Round | F | VVS2 | Excellent
From $355
Compare at $1,150
Save 62.9%IGI | 1.89ct | Round | G | SI2 | Ideal
From $356
Compare at $959
Save 67.8%IGI | 1.82ct | Round | F | VVS2 | Excellent
From $356
Compare at $1,107
Save 75.8%IGI | 1.84ct | Round | E | VS1 | Excellent
From $356
Compare at $1,470
Entry pricing in this category starts around $290.
What to Know When Shopping for 1.8 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $7,422 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 $1,130 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.
- 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 3,983 comparable stones in this segment. Prices start around $290 and go up to $7,712.
Based on the latest market data, the average asking price is about $1,356 with a median around $1,130.
The observed spread is roughly $7,422 across tracked listings, which is about 96.2% 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 $1,356. The median price is $1,130, 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 11 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 $7,422 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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