4.9 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 4.9 carat marquise lab grown diamonds usually range from $819 to $11,187, with an average price of $1,588.In the last month, prices for these diamonds are down 1.4%.Compare 277 verified listings across 7 retailers tracked by CaratRadar.
4.9 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 277 verified 4.9-carat marquise lab grown diamonds listed across 7 online retailers. Prices in this segment range from $819 to $11,187, with an average asking price of $1,588 and a median of $1,345.
The price spread of $10,368 (92.7% 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.
277 diamonds tracked in this segment
Price range: $819 to $11,187
Average price: $1,588
Median price: $1,345
Available across 7 retailers
Savings potential: up to 92.7%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
277
$819
$1,588
$1,345
$11,187
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGISave 80.1%4.85ct | Marquise | G | VS2 | Ideal
From $1,060
Compare at $5,340
IGISave 85.7%4.85ct | Marquise | G | VVS2 | Ideal
From $1,376
Compare at $9,590
IGISave 67.8%4.85ct | Marquise | E | VVS2 | Excellent
From $1,656
Compare at $5,140
IGISave 68%4.85ct | Marquise | E | VS1 | Ideal
From $1,335
Compare at $4,170
IGISave 66.8%4.85ct | Marquise | E | VS1 | Ideal
From $1,335
Compare at $4,025
IGISave 66.1%4.85ct | Marquise | E | VS1 | Ideal
From $1,365
Compare at $4,025
IGISave 80.7%4.85ct | Marquise | E | VS2 | Very Good
From $1,676
Compare at $8,680
IGISave 90.4%4.85ct | Marquise | E | VS1 | Ideal
From $1,148
Compare at $11,920
IGISave 67.2%4.85ct | Marquise | E | VS1 | Ideal
From $1,320
Compare at $4,025
IGISave 68.4%4.85ct | Marquise | F | VS1 | Ideal
From $1,210
Compare at $3,830
IGISave 65.9%4.85ct | Marquise | E | VS2 | Ideal
From $1,289
Compare at $3,780
IGISave 66.5%4.85ct | Marquise | E | VS1 | Ideal
From $1,350
Compare at $4,025
IGISave 65%4.85ct | Marquise | F | VS1 | Ideal
From $1,289
Compare at $3,685
IGISave 88.2%4.85ct | Marquise | E | VS1 | Excellent
From $1,419
Compare at $11,990
IGISave 60.2%4.85ct | Marquise | H | VVS2 | Ideal
From $1,179
Compare at $2,962
IGISave 66.7%4.85ct | Marquise | F | VS1 | Ideal
From $1,226
Compare at $3,685
IGISave 70.2%4.85ct | Marquise | D | VS1 | Ideal
From $1,415
Compare at $4,750
IGISave 64.6%4.85ct | Marquise | F | VS1 | Ideal
From $1,305
Compare at $3,685
IGISave 53.9%4.85ct | Marquise | D | VS2 | Ideal
From $3,331
Compare at $7,230
IGISave 67.6%4.85ct | Marquise | F | VS2 | Ideal
From $1,194
Compare at $3,685
IGISave 68.3%4.85ct | Marquise | E | VS2 | Ideal
From $1,246
Compare at $3,925
IGISave 90.9%4.85ct | Marquise | E | VS1 | Ideal
From $1,088
Compare at $11,920
IGISave 67.6%4.85ct | Marquise | E | VS1 | Ideal
From $1,350
Compare at $4,170
IGISave 66.1%4.85ct | Marquise | E | VS1 | Ideal
From $1,365
Compare at $4,025
IGISave 80.8%4.85ct | Marquise | E | VS1 | Very Good
From $1,754
Compare at $9,130
IGISave 75.6%4.85ct | Marquise | G | SI1 | Very Good
From $1,291
Compare at $5,290
IGISave 88.8%4.85ct | Marquise | E | VVS2 | Ideal
From $1,324
Compare at $11,850
IGISave 84.6%4.85ct | Marquise | G | VS2 | Ideal
From $865
Compare at $5,610
IGISave 66.5%4.85ct | Marquise | E | VS1 | Ideal
From $1,350
Compare at $4,025
IGISave 66.8%4.85ct | Marquise | E | VS1 | Ideal
From $1,335
Compare at $4,025
IGISave 65.9%4.85ct | Marquise | E | VS2 | Ideal
From $1,289
Compare at $3,780
IGISave 65.9%4.85ct | Marquise | F | VS1 | Ideal
From $1,305
Compare at $3,830
IGISave 50.6%4.86ct | Marquise | G | VS1 | Excellent
From $2,885
Compare at $5,840
IGISave 73.2%4.86ct | Marquise | G | VS2 | Excellent
From $1,780
Compare at $6,629
IGISave 87.1%4.86ct | Marquise | F | VS1 | Ideal
From $921
Compare at $7,120
IGISave 66.8%4.86ct | Marquise | E | VS1 | Ideal
From $1,338
Compare at $4,030
IGISave 67.6%4.86ct | Marquise | E | VS1 | Ideal
From $1,353
Compare at $4,175
IGISave 66.8%4.86ct | Marquise | E | VS1 | Ideal
From $1,338
Compare at $4,030
IGISave 65.9%4.86ct | Marquise | F | VS1 | Excellent
From $1,308
Compare at $3,835
IGISave 71.3%4.86ct | Marquise | E | VVS2 | Ideal
From $2,879
Compare at $10,050
IGISave 90.6%4.86ct | Marquise | E | VS2 | Ideal
From $898
Compare at $9,560
IGISave 67.2%4.86ct | Marquise | E | VS1 | Ideal
From $1,323
Compare at $4,030
IGISave 66.4%4.86ct | Marquise | E | VS1 | Ideal
From $1,353
Compare at $4,030
IGISave 90.1%4.86ct | Marquise | E | VS2 | Ideal
From $943
Compare at $9,560
IGISave 67.2%4.86ct | Marquise | E | VS2 | Ideal
From $1,292
Compare at $3,935
IGISave 71.3%4.86ct | Marquise | D | VS2 | Excellent
From $1,353
Compare at $4,710
IGISave 71.4%4.86ct | Marquise | F | VVS2 | Ideal
From $1,418
Compare at $4,955
IGISave 76.2%4.86ct | Marquise | G | VS1 | Very Good
From $1,515
Compare at $6,360
IGISave 80.3%4.86ct | Marquise | G | VVS1 | Excellent
From $3,753
Compare at $19,060
IGISave 53.9%4.86ct | Marquise | E | VS1 | Ideal
From $3,338
Compare at $7,240
Entry pricing in this category starts around $819.
What to Know When Shopping for 4.9 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $10,368 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 $1,345 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 277 comparable stones in this segment. Prices start around $819 and go up to $11,187.
Based on the latest market data, the average asking price is about $1,588 with a median around $1,345.
The observed spread is roughly $10,368 across tracked listings, which is about 92.7% 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 $1,345, 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 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 $10,368 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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