3.1 Carat Marquise Natural Diamond Prices Comparison
As of February 2026, 3.1 carat marquise natural diamonds usually range from $821 to $98,146, with an average price of $21,776.In the last month, prices for these diamonds are down 2.3%.Compare 19 verified listings across 5 retailers tracked by CaratRadar.
3.1 Carat Marquise Natural Diamond Market Overview
CaratRadar currently tracks 19 verified 3.1-carat marquise natural diamonds listed across 5 online retailers. Prices in this segment range from $821 to $98,146, with an average asking price of $21,776 and a median of $1,079.
The price spread of $97,325 (99.2% 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.
19 diamonds tracked in this segment
Price range: $821 to $98,146
Average price: $21,776
Median price: $1,079
Available across 5 retailers
Savings potential: up to 99.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
19
$821
$21,776
$1,079
$98,146
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIASave 12.4%3.05ct | Marquise | I | VS1 | Good
From $37,701
Compare at $43,028
3.05ct | Marquise | F | VS2 | Very Good
From $1,075
Compare at $4,290
IGISave 67.4%3.06ct | Marquise | E | VVS2 | Excellent
From $990
Compare at $3,038
GIASave 18.2%3.06ct | Marquise | E | SI2 | Excellent
From $46,064
Compare at $56,282
IGISave 18%3.08ct | Marquise | E | VVS2 | Very Good
From $1,212
Compare at $1,477
IGISave 21%3.08ct | Marquise | F | VVS2 | Very Good
From $821
Compare at $1,040
IGISave 21.6%3.08ct | Marquise | F | VVS2 | Very Good
From $839
Compare at $1,070
3.09ct | Marquise | F | VS2 | Very Good
From $1,079
Compare at $3,810
IGISave 72%3.09ct | Marquise | F | VVS2 | Very Good
From $847
Compare at $3,025
3.09ct | Marquise | F | VS2 | Very Good
From $1,079
Compare at $5,320
IGISave 68.8%3.09ct | Marquise | F | VS2 | Very Good
From $1,079
Compare at $3,460
IGISave 79.7%3.09ct | Marquise | F | VS2 | Very Good
From $1,079
Compare at $5,320
3.09ct | Marquise | I | VS1 | Very Good
From $1,179
Compare at $2,037
GIASave 18.2%3.1ct | Marquise | I | VVS2 | Excellent
From $48,039
Compare at $58,695
GIA3.1ct | Marquise | D | VS2 | Ideal
From $64,407
Compare at $64,935
GIA3.11ct | Marquise | G | SI1 | Excellent
From $53,262
Compare at $58,686
IGISave 74.6%3.12ct | Marquise | F | VS2 | Very Good
From $886
Compare at $3,490
GIA3.12ct | Marquise | H | SI1 | Excellent
From $53,963
Compare at $55,965
GIA3.13ct | Marquise | D | FL | Very Good
From $98,146
Compare at $104,723
Entry pricing in this category starts around $821.
What to Know When Shopping for 3.1 Carat Marquise Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $97,325 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 $1,079 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.
- Compare natural vs. lab-grown options for the same carat and shape. Lab-grown diamonds are chemically identical but often 30-50% less expensive.
- 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 19 comparable stones in this segment. Prices start around $821 and go up to $98,146.
Based on the latest market data, the average asking price is about $21,776 with a median around $1,079.
The observed spread is roughly $97,325 across tracked listings, which is about 99.2% 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 $1,079, 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 $97,325 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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Tracking Natural inventory for 3.1 carat Marquise diamonds.