4.3 Carat Marquise Lab Grown Diamond Prices Comparison
As of April 2026, 4.3 carat marquise lab grown diamonds usually range from $509 to $18,707, with an average price of $4,442.In the last month, prices for these diamonds are up 0.3%.Compare 34 verified listings across 5 retailers tracked by CaratRadar.
4.3 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 34 verified 4.3-carat marquise lab grown diamonds listed across 5 online retailers. Prices in this segment range from $509 to $18,707, with an average asking price of $4,442 and a median of $3,407.
The price spread of $18,198 (97.3% 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.
34 diamonds tracked in this segment
Price range: $509 to $18,707
Average price: $4,442
Median price: $3,407
Available across 5 retailers
Savings potential: up to 97.3%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
34
$509
$4,442
$3,407
$18,707
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 75.5%IGI | 4.3ct | Marquise | G | VS2 | Ideal
From $1,462
Compare at $5,970
Save 37.3%IGI | 4.3ct | Marquise | H | VS1 | Ideal
From $941
Compare at $1,500
Save 82.6%IGI | 4.3ct | Marquise | G | VVS2 | Ideal
From $1,409
Compare at $8,100
Save 62.9%IGI | 4.3ct | Marquise | E | VS1 | Ideal
From $3,770
Compare at $10,160
Save 22.5%IGI | 4.31ct | Marquise | H | VS1 | Ideal
From $943
Compare at $1,217
Save 62.9%IGI | 4.31ct | Marquise | E | VS1 | Ideal
From $3,779
Compare at $10,190
Save 80.9%IGI | 4.31ct | Marquise | E | VVS1 | Excellent
From $4,790
Compare at $25,130
Save 75.1%IGI | 4.31ct | Marquise | G | VVS2 | Very Good
From $1,858
Compare at $7,460
Save 81.5%IGI | 4.31ct | Marquise | E | VS1 | Very Good
From $1,886
Compare at $10,200
Save 70.2%IGI | 4.32ct | Marquise | E | VVS1 | Ideal
From $4,090
Compare at $13,724
Save 63%IGI | 4.32ct | Marquise | F | VVS1 | Very Good
From $3,887
Compare at $10,500
Save 38.1%GIA | 4.33ct | Marquise | E | VVS1 | Excellent
From $7,546
Compare at $12,200
IGI | 4.33ct | Marquise | G | VS2 | Ideal
From $2,227
Compare at $2,230
Save 78.6%IGI | 4.33ct | Marquise | F | VVS2 | Ideal
From $1,977
Compare at $9,230
Save 77.3%GCAL | 4.34ct | Marquise | F | VS1 | Excellent
From $2,475
Compare at $10,890
Save 77.7%GCAL | 4.34ct | Marquise | E | VVS2 | Excellent
From $2,139
Compare at $9,590
Save 78.2%IGI | 4.34ct | Marquise | G | VS2 | Ideal
From $1,476
Compare at $6,770
Save 62.9%IGI | 4.34ct | Marquise | E | VS1 | Ideal
From $3,805
Compare at $10,260
Save 62.9%IGI | 4.34ct | Marquise | E | VS1 | Ideal
From $3,805
Compare at $10,260
Save 84.1%IGI | 4.34ct | Marquise | F | VVS2 | Excellent
From $1,475
Compare at $9,250
Save 59.9%IGI | 4.34ct | Marquise | E | VVS1 | Excellent
From $4,183
Compare at $10,428
Save 74.7%IGI | 4.35ct | Marquise | F | VS2 | Ideal
From $1,894
Compare at $7,490
Save 80%IGI | 4.35ct | Marquise | E | VVS2 | Excellent
From $2,104
Compare at $10,510
Save 46.8%IGI | 4.35ct | Marquise | G | VS1 | Excellent
From $2,393
Compare at $4,500
Save 62.9%IGI | 4.36ct | Marquise | E | VS1 | Ideal
From $3,823
Compare at $10,310
Save 73.3%IGI | 4.36ct | Marquise | F | VS1 | Very Good
From $1,402
Compare at $5,260
Save 80.8%IGI | 4.36ct | Marquise | E | VVS2 | Excellent
From $1,871
Compare at $9,754
Save 41.2%IGI | 4.37ct | Marquise | G | VVS2 | Very Good
From $1,274
Compare at $2,166
Save 79.1%IGI | 4.37ct | Marquise | F | VVS1 | Excellent
From $3,713
Compare at $17,740
Save 37.2%IGI | 4.38ct | Marquise | H | VS1 | Ideal
From $958
Compare at $1,526
Save 36.9%IGI | 4.39ct | Marquise | H | VVS2 | Ideal
From $1,052
Compare at $1,667
Save 68.3%IGI | 4.39ct | Marquise | E | VS1 | Excellent
From $2,899
Compare at $9,148
Save 80%IGI | 4.39ct | Marquise | E | VVS2 | Excellent
From $2,124
Compare at $10,610
Save 82.6%IGI | 4.4ct | Marquise | F | VVS2 | Excellent
From $1,648
Compare at $9,460
Entry pricing in this category starts around $509.
What to Know When Shopping for 4.3 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $18,198 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 $3,407 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 34 comparable stones in this segment. Prices start around $509 and go up to $18,707.
Based on the latest market data, the average asking price is about $4,442 with a median around $3,407.
The observed spread is roughly $18,198 across tracked listings, which is about 97.3% 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 $3,407, 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 5 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 $18,198 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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