4.5 Carat Marquise Lab Grown Diamond Prices Comparison
As of April 2026, 4.5 carat marquise lab grown diamonds usually range from $725 to $17,644, with an average price of $4,081.In the last month, prices for these diamonds are down 1.7%.Compare 175 verified listings across 6 retailers tracked by CaratRadar.
4.5 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 175 verified 4.5-carat marquise lab grown diamonds listed across 6 online retailers. Prices in this segment range from $725 to $17,644, with an average asking price of $4,081 and a median of $2,991.
The price spread of $16,919 (95.9% 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.
175 diamonds tracked in this segment
Price range: $725 to $17,644
Average price: $4,081
Median price: $2,991
Available across 6 retailers
Savings potential: up to 95.9%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
175
$725
$4,081
$2,991
$17,644
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 77.2%GCAL | 4.5ct | Marquise | G | VS1 | Excellent
From $2,391
Compare at $10,490
Save 77.7%GCAL | 4.5ct | Marquise | F | VS1 | Excellent
From $2,014
Compare at $9,040
Save 47.1%IGI | 4.5ct | Marquise | G | VS1 | Excellent
From $1,852
Compare at $3,504
Save 67.6%IGI | 4.5ct | Marquise | G | VS1 | Ideal
From $1,658
Compare at $5,110
Save 75%IGI | 4.5ct | Marquise | G | VS2 | Ideal
From $1,323
Compare at $5,290
Save 78.7%IGI | 4.5ct | Marquise | G | VS2 | Ideal
From $1,591
Compare at $7,460
Save 76%IGI | 4.5ct | Marquise | G | VS1 | Ideal
From $1,309
Compare at $5,450
Save 64%IGI | 4.5ct | Marquise | E | VS1 | Excellent
From $2,189
Compare at $6,076
Save 77.5%IGI | 4.5ct | Marquise | F | VS1 | Ideal
From $1,752
Compare at $7,780
Save 84.1%IGI | 4.5ct | Marquise | E | VS1 | Ideal
From $1,765
Compare at $11,090
Save 74%IGI | 4.5ct | Marquise | D | VVS2 | Very Good
From $3,438
Compare at $13,230
Save 80.7%IGI | 4.5ct | Marquise | E | VVS2 | Ideal
From $2,125
Compare at $10,990
Save 73.4%IGI | 4.5ct | Marquise | D | VVS2 | Very Good
From $3,539
Compare at $13,320
Save 73.4%IGI | 4.5ct | Marquise | D | VVS2 | Very Good
From $3,539
Compare at $13,320
Save 76.3%IGI | 4.5ct | Marquise | F | VVS2 | Very Good
From $2,049
Compare at $8,640
Save 85.9%IGI | 4.5ct | Marquise | G | VVS2 | Ideal
From $1,248
Compare at $8,880
Save 41.9%IGI | 4.5ct | Marquise | F | VS1 | Very Good
From $1,457
Compare at $2,507
Save 80%IGI | 4.5ct | Marquise | F | VS1 | Very Good
From $1,336
Compare at $6,690
Save 64.8%IGI | 4.5ct | Marquise | F | VS2 | Very Good
From $1,677
Compare at $4,760
Save 24%IGI | 4.5ct | Marquise | FANCY | VVS2 | Ideal
From $4,445
Compare at $5,850
Save 40.5%IGI | 4.5ct | Marquise | G | VVS2 | Very Good
From $1,336
Compare at $2,245
Save 80.1%IGI | 4.5ct | Marquise | E | VVS2 | Excellent
From $2,190
Compare at $10,990
Save 81%IGI | 4.5ct | Marquise | E | VVS2 | Very Good
From $2,113
Compare at $11,100
Save 64.7%IGI | 4.5ct | Marquise | D | VVS1 | Ideal
From $5,255
Compare at $14,870
Save 72.3%IGI | 4.5ct | Marquise | E | VS1 | Excellent
From $1,125
Compare at $4,065
Save 80%IGI | 4.5ct | Marquise | E | VVS2 | Very Good
From $2,220
Compare at $11,080
Save 77.5%IGI | 4.5ct | Marquise | F | VS1 | Very Good
From $1,348
Compare at $5,990
Save 81.4%IGI | 4.5ct | Marquise | F | VS1 | Excellent
From $1,551
Compare at $8,349
Save 70.7%GCAL | 4.51ct | Marquise | F | VS1 | Excellent
From $2,571
Compare at $8,770
Save 70.7%GCAL | 4.51ct | Marquise | F | VS1 | Excellent
From $2,571
Compare at $8,770
Save 76.9%GIA | 4.51ct | Marquise | E | VS1 | Excellent
From $7,658
Compare at $33,210
Save 78.2%GIA | 4.51ct | Marquise | G | VS2 | Excellent
From $2,382
Compare at $10,900
Save 76.2%IGI | 4.51ct | Marquise | H | VS1 | Ideal
From $1,575
Compare at $6,630
Save 76.1%IGI | 4.51ct | Marquise | G | VS1 | Ideal
From $1,754
Compare at $7,340
Save 37.1%IGI | 4.51ct | Marquise | H | VS1 | Ideal
From $986
Compare at $1,568
Save 80.8%IGI | 4.51ct | Marquise | F | SI1 | Ideal
From $1,395
Compare at $7,280
Save 61%IGI | 4.51ct | Marquise | G | VS2 | Excellent
From $1,635
Compare at $4,191
Save 81%IGI | 4.51ct | Marquise | E | VS1 | Ideal
From $2,117
Compare at $11,150
Save 73%IGI | 4.51ct | Marquise | G | VS1 | Ideal
From $1,312
Compare at $4,860
Save 84.1%IGI | 4.51ct | Marquise | E | VS1 | Ideal
From $1,769
Compare at $11,120
Save 64.1%IGI | 4.51ct | Marquise | E | VS2 | Ideal
From $3,237
Compare at $9,010
Save 65.6%IGI | 4.51ct | Marquise | F | VS2 | Excellent
From $1,850
Compare at $5,373
Save 64%IGI | 4.51ct | Marquise | E | VS1 | Excellent
From $2,194
Compare at $6,089
Save 83.4%IGI | 4.51ct | Marquise | F | VVS2 | Excellent
From $1,689
Compare at $10,170
Save 44.5%IGI | 4.51ct | Marquise | H | VS2 | Ideal
From $1,232
Compare at $2,220
Save 36.5%IGI | 4.51ct | Marquise | E | VVS2 | Very Good
From $3,058
Compare at $4,812
Save 76.3%IGI | 4.51ct | Marquise | E | VVS2 | Very Good
From $2,245
Compare at $9,460
Save 86.6%IGI | 4.51ct | Marquise | F | VS2 | Ideal
From $1,057
Compare at $7,870
Save 42.1%IGI | 4.51ct | Marquise | E | VVS2 | Very Good
From $2,225
Compare at $3,841
Save 76.8%IGI | 4.51ct | Marquise | D | VS1 | Ideal
From $2,645
Compare at $11,380
Entry pricing in this category starts around $725.
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 $16,919 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 $2,991 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 175 comparable stones in this segment. Prices start around $725 and go up to $17,644.
Based on the latest market data, the average asking price is about $4,081 with a median around $2,991.
The observed spread is roughly $16,919 across tracked listings, which is about 95.9% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on our data, the median price is $2,991, which represents the midpoint of the market. Anything below this figure from a reputable retailer is a solid deal.
We currently track this stone category across 6 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 $16,919 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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