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

As of October 2026, 3.00 to 4.99ct E SI2 natural marquise diamonds typically cost $39,250 AUD to $90,323 AUD, with a median price of $58,617 AUD. There are currently 34 diamonds matching this specification available across retailers.

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

About 37% of these diamonds are available at multiple retailers, with an average price spread of 28%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct E SI2 Natural Marquise

Quick answer

As of October 2026, there are 34 natural marquise diamonds with E colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $39,250 AUD to $90,323 AUD, with a median of $58,617 AUD. At least 45 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 28%. Half of all listings fall between $16,634 AUD and $22,008 AUD per carat. The same specification in lab grown form lists at a median of about $463 AUD per carat. Over the last 30 days the median price moved -0.6% and the number of listings moved +11.6%.

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: October 2026

Available

Lowest Price

$28,262 AUD

Highest Price

$166,214 AUD

Average Price

$63,848 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

36.8%

Price Spread

27.9%

30-Day Price Trend

-0.6%

30-Day Supply Change

+11.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$13,553/ct

10th Percentile

$8,974

Median

$13,553

90th Percentile

$17,085

Score Distribution

70 diamonds scored across 4 quality tiers

Excellent

24 (34.3%)

Very Good

23 (32.9%)

Good

7 (10.0%)

Average

16 (22.9%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

Lab-Grown E SI2Same specifications, lab-grown origin

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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