5.9 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 5.9 carat marquise lab grown diamonds usually range from $919 to $9,105, with an average price of $2,213.In the last month, prices for these diamonds are down 1.9%.Compare 32 verified listings across 4 retailers tracked by CaratRadar.
5.9 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 32 verified 5.9-carat marquise lab grown diamonds listed across 4 online retailers. Prices in this segment range from $919 to $9,105, with an average asking price of $2,213 and a median of $1,615.
The price spread of $8,186 (89.9% 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.
32 diamonds tracked in this segment
Price range: $919 to $9,105
Average price: $2,213
Median price: $1,615
Available across 4 retailers
Savings potential: up to 89.9%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
32
$919
$2,213
$1,615
$9,105
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 81.7%5.85ct | Marquise | G | SI2 | Very Good
From $1,270
Compare at $6,940
IGISave 90%5.85ct | Marquise | E | VS2 | Ideal
From $1,161
Compare at $11,580
IGISave 87.7%5.85ct | Marquise | D | VS2 | Ideal
From $1,557
Compare at $12,640
IGISave 71.5%5.86ct | Marquise | F | VS1 | Ideal
From $1,270
Compare at $4,450
IGISave 81.2%5.86ct | Marquise | F | VVS2 | Excellent
From $1,940
Compare at $10,300
IGISave 66%5.86ct | Marquise | F | VS2 | Ideal
From $1,869
Compare at $5,490
IGISave 89.2%5.86ct | Marquise | E | VVS2 | Good
From $1,738
Compare at $16,130
IGISave 82.6%5.86ct | Marquise | F | VS1 | Ideal
From $1,359
Compare at $7,810
GIASave 70.7%5.86ct | Marquise | E | VVS2 | Excellent
From $6,020
Compare at $20,570
IGISave 50.6%5.87ct | Marquise | E | VS1 | Ideal
From $3,226
Compare at $6,530
IGISave 88.4%5.87ct | Marquise | E | VS2 | Ideal
From $1,344
Compare at $11,560
IGISave 72.6%5.87ct | Marquise | F | VS1 | Ideal
From $1,272
Compare at $4,635
IGISave 52.1%5.87ct | Marquise | E | VS1 | Ideal
From $2,171
Compare at $4,530
IGISave 53.1%5.87ct | Marquise | D | VVS1 | Ideal
From $9,105
Compare at $19,410
IGISave 84%5.87ct | Marquise | F | VS2 | Ideal
From $1,673
Compare at $10,430
5.88ct | Marquise | F | VS2 | Excellent
From $1,454
Compare at $11,940
IGISave 91.1%5.88ct | Marquise | F | VS2 | Ideal
From $919
Compare at $10,320
IGISave 86.7%5.89ct | Marquise | D | VS1 | Ideal
From $2,000
Compare at $14,990
IGISave 87.7%5.89ct | Marquise | E | VVS2 | Excellent
From $1,786
Compare at $14,530
IGISave 83.4%5.89ct | Marquise | F | VS1 | Ideal
From $1,366
Compare at $8,240
IGISave 85.8%5.9ct | Marquise | E | VVS2 | Ideal
From $2,066
Compare at $14,550
IGISave 75.5%5.91ct | Marquise | G | VS2 | Very Good
From $1,389
Compare at $5,680
IGISave 88.3%5.91ct | Marquise | D | VS2 | Ideal
From $1,493
Compare at $12,770
IGISave 88.4%5.91ct | Marquise | E | VS2 | Ideal
From $1,353
Compare at $11,640
IGISave 50.6%5.93ct | Marquise | E | VS1 | Ideal
From $3,257
Compare at $6,590
IGISave 50.6%5.93ct | Marquise | E | VS1 | Ideal
From $3,257
Compare at $6,590
IGISave 90%5.93ct | Marquise | F | VS2 | Excellent
From $1,204
Compare at $12,040
GIASave 40.3%5.94ct | Marquise | F | VVS2 | Excellent
From $5,966
Compare at $9,990
IGISave 87.9%5.95ct | Marquise | E | VS1 | Very Good
From $1,781
Compare at $14,720
IGISave 87.7%5.95ct | Marquise | E | VS1 | Ideal
From $1,827
Compare at $14,870
IGISave 88.8%5.95ct | Marquise | F | VS1 | Ideal
From $1,362
Compare at $12,190
IGISave 87%5.95ct | Marquise | F | VS2 | Ideal
From $1,362
Compare at $10,440
Entry pricing in this category starts around $919.
What to Know When Shopping for 5.9 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $8,186 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 $1,615 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 32 comparable stones in this segment. Prices start around $919 and go up to $9,105.
Based on the latest market data, the average asking price is about $2,213 with a median around $1,615.
The observed spread is roughly $8,186 across tracked listings, which is about 89.9% 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 $1,615, 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 4 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 $8,186 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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