3.5 Carat Marquise Natural Diamond Prices Comparison
As of October 2026, 3.5 carat marquise natural diamonds in the 3.50–3.99 carat benchmark range usually range from $4,933 to $139,102, with an average price of $58,768.In the last month, prices for these diamonds are flat -0%.Compare 50 verified listings across 10 retailers tracked by CaratRadar.
3.5 Carat Marquise Natural Diamond Market Overview
CaratRadar currently tracks 50 verified 3.5-carat marquise natural diamonds in the 3.50–3.99 carat benchmark range, listed across 10 online retailers. Prices in this segment range from $4,933 to $139,102, with an average asking price of $58,768 and a median of $57,101.
The price spread of $134,169 (96.5% 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 use the same benchmark range throughout the page and 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.
50 diamonds tracked in the 3.50–3.99 carat benchmark
Price range: $4,933 to $139,102
Average price: $58,768
Median price: $57,101
Available across 10 retailers
Savings potential: up to 96.5%
Price Range Overview
As of Oct 13, 2026Real market range for this carat, shape, and diamond type.
50
$4,933
$58,768
$57,101
$139,102
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers in the same benchmark range and open any listing for full details.
Save 10.3%GIA | 3.51ct | Marquise | K | SI2 | Ideal
From $26,518
Compare at $29,549
Save 14.9%IGI | 3.53ct | Marquise | J | VS2 | Ideal
From $28,769
Compare at $33,787
GIA | 3.52ct | Marquise | J | SI2 | Excellent
From $31,960
Compare at $35,010
Save 12.2%IGI | 3.51ct | Marquise | I | SI1 | Very Good
From $35,506
Compare at $40,417
Save 14%IGI | 3.51ct | Marquise | I | VVS2 | Ideal
From $35,962
Compare at $41,811
Save 12.2%IGI | 3.51ct | Marquise | I | VS2 | Very Good
From $36,593
Compare at $41,660
Save 22.8%GIA | 3.7ct | Marquise | J | VVS1 | Very Good
From $37,778
Compare at $48,929
Save 24.2%GIA | 3.5ct | Marquise | J | SI1 | Very Good
From $38,133
Compare at $50,308
GIA | 3.5ct | Marquise | I | SI2 | Excellent
From $39,057
Compare at $40,926
Save 20%GIA | 3.73ct | Marquise | J | VS1 | Good
From $40,770
Compare at $50,949
GIA | 3.84ct | Marquise | J | VVS2 | Very Good
From $42,631
Compare at $45,448
Save 24.3%GIA | 3.5ct | Marquise | H | SI2 | Excellent
From $43,202
Compare at $57,097
Save 26.8%GIA | 3.76ct | Marquise | I | SI1 | Excellent
From $46,145
Compare at $63,012
Save 17.6%GIA | 3.56ct | Marquise | H | SI2 | Excellent
From $47,511
Compare at $57,666
Save 19.3%GIA | 3.51ct | Marquise | G | SI2 | Ideal
From $47,780
Compare at $59,231
GIA | 3.51ct | Marquise | I | VS2 | Excellent
From $48,251
Compare at $49,356
Save 14.6%GIA | 3.5ct | Marquise | H | SI1 | Excellent
From $48,328
Compare at $56,600
GIA | 3.52ct | Marquise | H | SI2 | Excellent
From $48,574
Compare at $53,401
Save 17.6%GIA | 3.67ct | Marquise | F | SI2 | Very Good
From $48,728
Compare at $59,147
Save 20.2%GIA | 3.53ct | Marquise | I | VS2 | Excellent
From $49,343
Compare at $61,812
GIA | 3.97ct | Marquise | H | SI2 | Good
From $49,517
Compare at $51,683
Save 24.5%GIA | 3.51ct | Marquise | H | SI1 | Excellent
From $50,328
Compare at $66,640
GIA | 3.7ct | Marquise | F | SI2 | Excellent
From $51,096
Compare at $54,916
Save 16.7%GIA | 3.51ct | Marquise | D | SI2 | Ideal
From $51,585
Compare at $61,916
GIA | 3.59ct | Marquise | I | SI2 | Excellent
From $51,928
Compare at $57,216
Save 25.3%GIA | 3.51ct | Marquise | D | SI2 | Excellent
From $55,241
Compare at $73,921
GIA | 3.52ct | Marquise | G | SI2 | Excellent
From $55,344
Compare at $60,984
Save 19.4%GIA | 3.51ct | Marquise | D | SI2 | Excellent
From $56,300
Compare at $69,889
Save 24.4%GIA | 3.69ct | Marquise | G | VS2 | Very Good
From $56,439
Compare at $74,655
Save 23.5%GIA | 3.7ct | Marquise | E | SI1 | Ideal
From $56,508
Compare at $73,831
Save 21.8%GIA | 3.5ct | Marquise | D | SI2 | Very Good
From $56,637
Compare at $72,466
Save 13.4%GIA | 3.52ct | Marquise | H | VS2 | Excellent
From $58,667
Compare at $67,725
Save 22%GIA | 3.71ct | Marquise | H | SI1 | Excellent
From $58,730
Compare at $75,294
Save 27.2%GIA | 3.52ct | Marquise | F | SI1 | Excellent
From $61,075
Compare at $83,947
GIA | 3.55ct | Marquise | I | VS2 | Very Good
From $61,414
Compare at $67,681
Save 22%GIA | 3.52ct | Marquise | F | SI1 | Excellent
From $61,776
Compare at $79,200
GIA | 3.51ct | Marquise | D | SI1 | Very Good
From $64,718
Compare at $70,019
Save 26.8%GIA | 3.62ct | Marquise | D | VS2 | Ideal
From $67,890
Compare at $92,706
GIA | 3.55ct | Marquise | D | VS2 | Good
From $73,676
Compare at $74,878
Save 17.1%GIA | 3.53ct | Marquise | F | VVS2 | Excellent
From $74,332
Compare at $89,613
GIA | 3.7ct | Marquise | D | SI1 | Excellent
From $75,700
Compare at $79,953
Save 22%GIA | 3.51ct | Marquise | D | VS2 | Ideal
From $83,161
Compare at $106,616
GIA | 3.5ct | Marquise | D | VS2 | Ideal
From $84,860
Compare at $86,914
GIA | 3.51ct | Marquise | D | FL | Ideal
From $89,593
Compare at $96,906
Save 21.8%GIA | 3.89ct | Marquise | D | SI1 | Very Good
From $89,864
Compare at $114,938
Save 22%GIA | 3.51ct | Marquise | D | VS1 | Excellent
From $92,401
Compare at $118,463
Save 16.8%GIA | 3.8ct | Marquise | D | VS2 | Excellent
From $94,515
Compare at $113,587
Save 11.2%GIA | 3.5ct | Marquise | D | IF | Very Good
From $97,587
Compare at $109,878
Save 22%GIA | 3.52ct | Marquise | D | VVS2 | Excellent
From $100,386
Compare at $128,700
GIA | 3.54ct | Marquise | D | IF | Excellent
From $131,275
Compare at $134,479
Entry pricing in this benchmark range starts around $4,933.
What to Know When Shopping for 3.5 Carat Marquise Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $134,169 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 $57,101 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 50 comparable stones in the 3.50–3.99 carat benchmark range. Prices start around $4,933 and go up to $139,102.
Based on the latest market data, the average asking price is about $58,768 with a median around $57,101.
The observed spread is roughly $134,169 across tracked listings, which is about 96.5% from highest to lowest offer in the 3.50–3.99 carat benchmark range.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $58,768. The median price is $57,101, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
We currently track this stone category across 10 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 $134,169 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 the 3.50–3.99 carat Marquise diamond benchmark.