3.1 Carat Marquise Lab Grown Diamond Prices Comparison
As of February 2026, 3.1 carat marquise lab grown diamonds usually range from $644 to $10,536, with an average price of $1,169.In the last month, prices for these diamonds are down 1.3%.Compare 6,417 verified listings across 12 retailers tracked by CaratRadar.
3.1 Carat Marquise Lab Grown Diamond Market Overview
CaratRadar currently tracks 6,417 verified 3.1-carat marquise lab grown diamonds listed across 12 online retailers. Prices in this segment range from $644 to $10,536, with an average asking price of $1,169 and a median of $1,071.
The price spread of $9,892 (93.9% 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.
6,417 diamonds tracked in this segment
Price range: $644 to $10,536
Average price: $1,169
Median price: $1,071
Available across 12 retailers
Savings potential: up to 93.9%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
6,417
$644
$1,169
$1,071
$10,536
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 53.5%3.05ct | Marquise | D | VS1 | Excellent
From $1,397
Compare at $3,004
IGISave 84.1%3.05ct | Marquise | D | VS1 | Excellent
From $1,246
Compare at $7,823
IGISave 45.2%3.05ct | Marquise | E | VS2 | Excellent
From $1,302
Compare at $2,375
IGISave 57.6%3.05ct | Marquise | F | VS2 | Ideal
From $2,225
Compare at $5,250
IGISave 46.8%3.05ct | Marquise | E | VS2 | Ideal
From $1,315
Compare at $2,470
IGISave 83%3.05ct | Marquise | D | VS1 | Very Good
From $1,328
Compare at $7,823
IGISave 35.9%3.05ct | Marquise | E | VS1 | Very Good
From $1,038
Compare at $1,620
IGISave 46.2%3.05ct | Marquise | D | VS1 | Excellent
From $1,607
Compare at $2,985
IGISave 47%3.05ct | Marquise | E | VS1 | Excellent
From $1,341
Compare at $2,530
IGISave 48.3%3.05ct | Marquise | E | VS1 | Ideal
From $1,355
Compare at $2,620
IGISave 48.8%3.05ct | Marquise | E | VS1 | Ideal
From $1,341
Compare at $2,620
IGISave 58.2%3.05ct | Marquise | F | VVS2 | Excellent
From $1,249
Compare at $2,985
IGISave 56.4%3.05ct | Marquise | E | VVS2 | Excellent
From $1,408
Compare at $3,230
IGISave 46.4%3.05ct | Marquise | E | VS1 | Excellent
From $1,355
Compare at $2,530
IGISave 42.4%3.05ct | Marquise | D | VS2 | Ideal
From $3,080
Compare at $5,350
IGISave 42.6%3.05ct | Marquise | F | VS1 | Excellent
From $1,328
Compare at $2,315
IGISave 47%3.05ct | Marquise | E | VS1 | Excellent
From $1,341
Compare at $2,530
IGISave 47%3.05ct | Marquise | E | VS1 | Excellent
From $1,341
Compare at $2,530
IGISave 46.4%3.05ct | Marquise | E | VS1 | Excellent
From $1,355
Compare at $2,530
IGISave 85.8%3.05ct | Marquise | E | VVS2 | Excellent
From $1,036
Compare at $7,300
IGISave 64.5%3.05ct | Marquise | F | VVS2 | Excellent
From $1,059
Compare at $2,985
IGISave 25%3.05ct | Marquise | E | VVS2 | Excellent
From $1,981
Compare at $2,640
IGISave 85.6%3.05ct | Marquise | G | VS1 | Ideal
From $832
Compare at $5,790
IGISave 73.9%3.05ct | Marquise | E | VVS2 | Excellent
From $941
Compare at $3,609
IGISave 83.9%3.05ct | Marquise | E | VVS2 | Excellent
From $1,176
Compare at $7,300
IGISave 74.7%3.05ct | Marquise | E | VVS2 | Excellent
From $1,206
Compare at $4,772
IGISave 81.6%3.05ct | Marquise | D | VVS2 | Excellent
From $1,554
Compare at $8,450
IGISave 83.2%3.05ct | Marquise | D | VVS2 | Excellent
From $1,417
Compare at $8,450
IGISave 73.9%3.05ct | Marquise | E | VVS2 | Excellent
From $941
Compare at $3,609
IGISave 84.5%3.05ct | Marquise | G | VS1 | Ideal
From $802
Compare at $5,180
IGISave 84.8%3.05ct | Marquise | E | VS1 | Ideal
From $996
Compare at $6,570
IGISave 87%3.05ct | Marquise | E | VVS2 | Very Good
From $946
Compare at $7,300
IGISave 87%3.05ct | Marquise | E | VVS2 | Very Good
From $946
Compare at $7,300
IGISave 85.5%3.05ct | Marquise | E | VVS1 | Good
From $1,152
Compare at $7,930
IGISave 42.8%3.05ct | Marquise | F | VVS2 | Ideal
From $2,620
Compare at $4,580
IGISave 80.6%3.05ct | Marquise | G | VVS2 | Very Good
From $661
Compare at $3,410
3.05ct | Marquise | G | VVS2 | Excellent
From $947
Compare at $1,002
IGISave 70.2%3.05ct | Marquise | F | VVS2 | Ideal
From $1,270
Compare at $4,260
IGISave 74.5%3.05ct | Marquise | F | VS2 | Excellent
From $1,079
Compare at $4,230
IGISave 84.2%3.05ct | Marquise | E | VS1 | Ideal
From $1,117
Compare at $7,080
IGISave 86%3.05ct | Marquise | E | VVS2 | Ideal
From $1,034
Compare at $7,380
IGISave 64.7%3.05ct | Marquise | F | VVS2 | Excellent
From $1,096
Compare at $3,110
IGISave 64.7%3.05ct | Marquise | E | VS1 | Excellent
From $893
Compare at $2,530
IGISave 74%3.05ct | Marquise | E | VS2 | Excellent
From $1,099
Compare at $4,230
IGISave 86%3.05ct | Marquise | E | VVS2 | Ideal
From $1,034
Compare at $7,380
IGISave 46.3%3.05ct | Marquise | D | VVS2 | Excellent
From $1,109
Compare at $2,064
IGISave 81.8%3.05ct | Marquise | F | VS1 | Excellent
From $774
Compare at $4,260
IGISave 73.7%3.05ct | Marquise | F | VVS2 | Excellent
From $1,132
Compare at $4,300
IGISave 20%3.05ct | Marquise | E | VVS1 | Very Good
From $1,374
Compare at $1,717
IGISave 74.5%3.05ct | Marquise | F | VS2 | Excellent
From $1,079
Compare at $4,230
Entry pricing in this category starts around $644.
What to Know When Shopping for 3.1 Carat Marquise Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $9,892 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 $1,071 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 6,417 comparable stones in this segment. Prices start around $644 and go up to $10,536.
Based on the latest market data, the average asking price is about $1,169 with a median around $1,071.
The observed spread is roughly $9,892 across tracked listings, which is about 93.9% 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 $1,071, 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 12 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 $9,892 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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