4.5 Carat Marquise Lab Grown Diamond Prices Comparison
As of May 2026, 4.5 carat marquise lab grown diamonds usually range from $604 to $17,298, with an average price of $3,740.In the last month, prices for these diamonds are down 5.2%.Compare 138 verified listings across 7 retailers tracked by CaratRadar.
4.5 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 138 verified 4.5-carat marquise lab grown diamonds listed across 7 online retailers. Prices in this segment range from $604 to $17,298, with an average asking price of $3,740 and a median of $2,572.
The price spread of $16,694 (96.5% 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.
138 diamonds tracked in this segment
Price range: $604 to $17,298
Average price: $3,740
Median price: $2,572
Available across 7 retailers
Savings potential: up to 96.5%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
138
$604
$3,740
$2,572
$17,298
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 61.8%IGI | 4.5ct | Marquise | G | VS1 | Very Good
From $816
Compare at $2,138
Save 61.9%IGI | 4.51ct | Marquise | G | VS1 | Very Good
From $818
Compare at $2,146
Save 51.7%IGI | 4.51ct | Marquise | F | SI1 | Very Good
From $884
Compare at $1,830
Save 55.8%IGI | 4.51ct | Marquise | H | VS1 | Ideal
From $938
Compare at $2,124
Save 59.9%IGI | 4.56ct | Marquise | F | VS1 | Very Good
From $991
Compare at $2,469
Save 53.5%IGI | 4.55ct | Marquise | G | VS2 | Very Good
From $999
Compare at $2,150
Save 58.5%IGI | 4.52ct | Marquise | F | VS1 | Very Good
From $1,012
Compare at $2,436
Save 22.6%IGI | 4.51ct | Marquise | H | VS2 | Ideal
From $1,039
Compare at $1,343
Save 29.6%IGI | 4.55ct | Marquise | G | VS2 | Very Good
From $1,043
Compare at $1,481
Save 32.1%IGI | 4.58ct | Marquise | G | VVS2 | Very Good
From $1,049
Compare at $1,545
Save 64.8%IGI | 4.5ct | Marquise | F | VVS2 | Very Good
From $1,056
Compare at $3,000
Save 56.1%IGI | 4.5ct | Marquise | F | VS1 | Very Good
From $1,058
Compare at $2,408
Save 55.8%IGI | 4.52ct | Marquise | F | VVS2 | Very Good
From $1,062
Compare at $2,405
Save 55.3%IGI | 4.5ct | Marquise | F | VVS2 | Very Good
From $1,068
Compare at $2,388
Save 55.4%IGI | 4.52ct | Marquise | F | VVS2 | Very Good
From $1,073
Compare at $2,408
Save 64.8%IGI | 4.58ct | Marquise | F | VVS2 | Ideal
From $1,074
Compare at $3,053
Save 55%IGI | 4.51ct | Marquise | F | VVS2 | Very Good
From $1,080
Compare at $2,400
Save 56.8%IGI | 4.58ct | Marquise | F | VS1 | Very Good
From $1,085
Compare at $2,514
Save 55.2%IGI | 4.53ct | Marquise | F | VVS2 | Excellent
From $1,085
Compare at $2,421
Save 58.4%IGI | 4.51ct | Marquise | E | VS1 | Very Good
From $1,090
Compare at $2,620
Save 54.5%IGI | 4.52ct | Marquise | F | VVS2 | Excellent
From $1,110
Compare at $2,437
Save 45.1%IGI | 4.51ct | Marquise | F | VVS2 | Excellent
From $1,118
Compare at $2,036
Save 57.5%IGI | 4.52ct | Marquise | E | VS1 | Very Good
From $1,121
Compare at $2,637
Save 76.8%IGI | 4.5ct | Marquise | G | VS1 | Ideal
From $1,123
Compare at $4,850
Save 78.2%IGI | 4.51ct | Marquise | G | VS1 | Ideal
From $1,125
Compare at $5,160
Save 59.8%IGI | 4.51ct | Marquise | F | VS2 | Very Good
From $1,125
Compare at $2,800
Save 54.2%IGI | 4.56ct | Marquise | F | VVS2 | Excellent
From $1,130
Compare at $2,465
Save 56.8%IGI | 4.5ct | Marquise | E | VS1 | Excellent
From $1,135
Compare at $2,629
Save 79.4%IGI | 4.55ct | Marquise | G | VS1 | Ideal
From $1,136
Compare at $5,520
Save 54.8%IGI | 4.57ct | Marquise | F | VVS2 | Ideal
From $1,147
Compare at $2,535
Save 38.5%IGI | 4.59ct | Marquise | J | VVS2 | Excellent
From $1,147
Compare at $1,866
Save 77.5%IGI | 4.5ct | Marquise | G | VS1 | Ideal
From $1,160
Compare at $5,160
Save 46.6%IGI | 4.51ct | Marquise | G | VS1 | Excellent
From $1,164
Compare at $2,178
Save 46.8%IGI | 4.57ct | Marquise | G | VS1 | Very Good
From $1,171
Compare at $2,199
Save 55.6%IGI | 4.52ct | Marquise | E | VVS2 | Very Good
From $1,180
Compare at $2,655
Save 56%IGI | 4.57ct | Marquise | E | VVS2 | Very Good
From $1,193
Compare at $2,710
Save 54.6%IGI | 4.54ct | Marquise | E | VVS2 | Very Good
From $1,215
Compare at $2,674
Save 53.2%IGI | 4.5ct | Marquise | E | VVS2 | Very Good
From $1,232
Compare at $2,630
Save 53.2%IGI | 4.51ct | Marquise | E | VVS2 | Very Good
From $1,245
Compare at $2,660
Save 53.3%IGI | 4.52ct | Marquise | E | VVS2 | Very Good
From $1,248
Compare at $2,671
Save 53.4%IGI | 4.53ct | Marquise | E | VVS2 | Very Good
From $1,250
Compare at $2,683
Save 54.2%IGI | 4.59ct | Marquise | E | VVS2 | Very Good
From $1,257
Compare at $2,747
Save 47.1%IGI | 4.58ct | Marquise | F | VVS2 | Very Good
From $1,310
Compare at $2,478
Save 78.6%IGI | 4.59ct | Marquise | F | VS1 | Ideal
From $1,311
Compare at $6,130
Save 50.3%IGI | 4.51ct | Marquise | E | VVS2 | Excellent
From $1,333
Compare at $2,680
Save 49.6%IGI | 4.51ct | Marquise | E | VVS2 | Ideal
From $1,362
Compare at $2,703
Save 16.7%IGI | 4.51ct | Marquise | G | VS2 | Excellent
From $1,376
Compare at $1,652
Save 42.7%IGI | 4.5ct | Marquise | F | VS1 | Very Good
From $1,378
Compare at $2,406
Save 27.8%IGI | 4.59ct | Marquise | F | VS1 | Very Good
From $1,380
Compare at $1,912
Save 43.9%IGI | 4.56ct | Marquise | F | VS1 | Very Good
From $1,382
Compare at $2,465
Entry pricing in this category starts around $604.
What to Know When Shopping for 4.5 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $16,694 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 $2,572 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.
- Marquise diamonds maximize carat weight face-up and appear larger than their actual weight. Check symmetry carefully.
Frequently Asked Questions
We currently track 138 comparable stones in this segment. Prices start around $604 and go up to $17,298.
Based on the latest market data, the average asking price is about $3,740 with a median around $2,572.
The observed spread is roughly $16,694 across tracked listings, which is about 96.5% 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 $3,740. The median price is $2,572, 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 7 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 $16,694 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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