3 Carat Marquise Natural Diamond Prices Comparison
As of October 2026, 3 carat marquise natural diamonds in the 3.00–3.49 carat benchmark range usually range from $2,382 to $175,559, with an average price of $47,373.In the last month, prices for these diamonds are down 1.7%.Compare 319 verified listings across 10 retailers tracked by CaratRadar.
3 Carat Marquise Natural Diamond Market Overview
CaratRadar currently tracks 319 verified 3-carat marquise natural diamonds in the 3.00–3.49 carat benchmark range, listed across 10 online retailers. Prices in this segment range from $2,382 to $175,559, with an average asking price of $47,373 and a median of $46,352.
The price spread of $173,177 (98.6% 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.
319 diamonds tracked in the 3.00–3.49 carat benchmark
Price range: $2,382 to $175,559
Average price: $47,373
Median price: $46,352
Available across 10 retailers
Savings potential: up to 98.6%
Price Range Overview
As of Oct 15, 2026Real market range for this carat, shape, and diamond type.
319
$2,382
$47,373
$46,352
$175,559
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.
IGI | 3.02ct | Marquise | K | SI2 | Ideal
From $8,877
Compare at $8,918
Save 11.1%IGI | 3.01ct | Marquise | K | SI1 | Very Good
From $11,782
Compare at $13,259
Save 17%GIA | 3.01ct | Marquise | L | SI2 | Excellent
From $12,492
Compare at $15,043
Save 17.5%HRD | 3.01ct | Marquise | J | SI2 | Excellent
From $12,983
Compare at $15,743
IGI | 3.02ct | Marquise | I | SI2 | Very Good
From $13,130
Compare at $13,826
Save 17.1%IGI | 3.01ct | Marquise | J | SI2 | Very Good
From $13,442
Compare at $16,213
Save 18.3%HRD | 3.02ct | Marquise | J | SI2 | Ideal
From $13,678
Compare at $16,738
Save 25.3%GIA | 3.01ct | Marquise | L | SI2 | Good
From $14,575
Compare at $19,511
Save 18.3%IGI | 3.22ct | Marquise | I | SI2 | Very Good
From $14,793
Compare at $18,103
Save 18.3%IGI | 3.03ct | Marquise | L | VS1 | Very Good
From $15,353
Compare at $18,788
Save 25.4%GIA | 3ct | Marquise | L | SI2 | Ideal
From $15,537
Compare at $20,831
IGI | 3.01ct | Marquise | G | SI2 | Ideal
From $15,579
Compare at $16,058
GIA | 3.01ct | Marquise | L | SI1 | Excellent
From $15,858
Compare at $16,082
Save 11.9%IGI | 3.03ct | Marquise | J | SI1 | Very Good
From $17,236
Compare at $19,575
IGI | 3.01ct | Marquise | G | SI2 | Very Good
From $17,275
Compare at $17,805
HRD | 3.02ct | Marquise | H | SI2 | Ideal
From $17,350
Compare at $18,803
Save 18.3%GIA | 3.02ct | Marquise | L | VS2 | Excellent
From $17,359
Compare at $21,242
IGI | 3.03ct | Marquise | J | SI1 | Very Good
From $17,450
Compare at $19,040
IGI | 3.01ct | Marquise | H | SI2 | Ideal
From $17,567
Compare at $18,107
Save 25%GIA | 3.02ct | Marquise | K | SI2 | Very Good
From $17,619
Compare at $23,507
IGI | 3.01ct | Marquise | H | SI2 | Very Good
From $17,941
Compare at $18,493
GIA | 3.01ct | Marquise | K | SI2 | Very Good
From $18,250
Compare at $20,041
IGI | 3.01ct | Marquise | G | SI2 | Ideal
From $19,120
Compare at $20,481
HRD | 3.01ct | Marquise | I | SI2 | Ideal
From $19,145
Compare at $20,380
Save 44.4%GIA | 3.03ct | Marquise | L | VVS1 | Excellent
From $19,293
Compare at $34,713
IGI | 3.01ct | Marquise | H | SI2 | Ideal
From $20,460
Compare at $21,391
IGI | 3.01ct | Marquise | H | SI2 | Ideal
From $20,981
Compare at $21,937
IGI | 3.01ct | Marquise | G | SI2 | Ideal
From $20,983
Compare at $21,940
Save 27%GIA | 3.01ct | Marquise | K | SI1 | Ideal
From $21,124
Compare at $28,947
IGI | 3.01ct | Marquise | H | SI2 | Ideal
From $21,190
Compare at $22,918
Save 10.1%GIA | 3.08ct | Marquise | K | SI2 | Ideal
From $21,930
Compare at $24,390
Save 17.4%GIA | 3.01ct | Marquise | K | SI1 | Ideal
From $22,092
Compare at $26,741
GIA | 3.01ct | Marquise | K | SI1 | Excellent
From $22,552
Compare at $24,467
Save 17.1%GIA | 3.01ct | Marquise | K | SI2 | Ideal
From $22,553
Compare at $27,219
Save 13.3%GIA | 3.03ct | Marquise | J | VVS2 | Good
From $22,613
Compare at $26,085
HRD | 3.01ct | Marquise | D | SI2 | Ideal
From $23,008
Compare at $23,622
IGI | 3.01ct | Marquise | G | SI2 | Good
From $23,158
Compare at $24,213
Save 11.3%IGI | 3.01ct | Marquise | K | VS2 | Ideal
From $23,254
Compare at $26,227
GIA | 3.01ct | Marquise | K | SI2 | Excellent
From $23,695
Compare at $25,523
GIA | 3.01ct | Marquise | J | SI2 | Very Good
From $23,813
Compare at $25,556
IGI | 3.03ct | Marquise | I | VS2 | Very Good
From $23,927
Compare at $24,510
IGI | 3.01ct | Marquise | E | SI2 | Ideal
From $24,005
Compare at $25,099
Save 11.3%HRD | 3.01ct | Marquise | G | SI2 | Ideal
From $24,090
Compare at $27,166
HRD | 3.01ct | Marquise | H | SI2 | Ideal
From $24,580
Compare at $25,770
Save 18%GIA | 3.01ct | Marquise | K | SI2 | Very Good
From $25,108
Compare at $30,613
Save 13.6%IGI | 3.01ct | Marquise | I | SI1 | Very Good
From $25,490
Compare at $29,507
Save 20.8%GIA | 3.01ct | Marquise | K | IF | Very Good
From $25,758
Compare at $32,507
Save 19.1%GIA | 3.01ct | Marquise | K | VS2 | Very Good
From $25,782
Compare at $31,858
GIA | 3.01ct | Marquise | J | SI2 | Very Good
From $25,940
Compare at $28,422
IGI | 3.01ct | Marquise | H | SI1 | Very Good
From $25,996
Compare at $28,320
Entry pricing in this benchmark range starts around $2,382.
What to Know When Shopping for 3 Carat Marquise Natural Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $173,177 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 $46,352 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 319 comparable stones in the 3.00–3.49 carat benchmark range. Prices start around $2,382 and go up to $175,559.
Based on the latest market data, the average asking price is about $47,373 with a median around $46,352.
The observed spread is roughly $173,177 across tracked listings, which is about 98.6% from highest to lowest offer in the 3.00–3.49 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 $47,373. The median price is $46,352, 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 $173,177 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 3.00–3.49 carat Marquise diamond benchmark.