How much does a 3.00 to 4.99ct J SI2 natural marquise diamond cost?

As of November 2026, 3.00 to 4.99ct J SI2 natural marquise diamonds typically cost $13,912 USD to $44,879 USD, with a median price of $25,795 USD. There are currently 39 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI2 marquise diamond?

About 43% of these diamonds are available at multiple retailers, with an average price spread of 44%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct J SI2 Natural Marquise

Quick answer

As of November 2026, there are 39 natural marquise diamonds with J color and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $13,912 USD to $44,879 USD, with a median of $25,795 USD. At least 40 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between $5,863 USD and $9,462 USD per carat. Over the last 30 days the median price moved +4.4% and the number of listings moved +14.1%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise natural stones in the index: 2,268 USD per carat, +10.8% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: November 2026

Available

Lowest Price

$8,815 USD

Highest Price

$82,050 USD

Average Price

$27,997 USD

Market Intelligence

Retailers Selling

Cross Retailer %

43.3%

Price Spread

43.6%

30-Day Price Trend

+4.4%

30-Day Supply Change

+14.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$8,245/ct

10th Percentile

$4,616

Median

$8,245

90th Percentile

$10,700

Score Distribution

92 diamonds scored across 4 quality tiers

Excellent

15 (16.3%)

Very Good

40 (43.5%)

Good

16 (17.4%)

Average

21 (22.8%)

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Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1