How much does a 2.00 to 2.99ct I I1 natural marquise diamond cost?

As of September 2026, 2.00 to 2.99ct I I1 natural marquise diamonds typically cost $10,238 AUD to $56,596 AUD, with a median price of $19,018 AUD. There are currently 52 diamonds matching this specification available across retailers.

Where can I find the best price on a I I1 marquise diamond?

About 36% of these diamonds are available at multiple retailers, with an average price spread of 64%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I I1 Natural Marquise

Quick answer

As of September 2026, there are 52 natural marquise diamonds with I colour and I1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $10,238 AUD to $56,596 AUD, with a median of $19,018 AUD. At least 22 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 64%. Half of all listings fall between $6,298 AUD and $12,012 AUD per carat. The same specification in lab grown form lists at a median of about $2,545 AUD per carat. Over the last 30 days the median price moved -25.2% and the number of listings moved -11.2%.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Marquise natural stones in the index: 2,114 USD per carat, -8.8% month on month. See the full index release

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

Last updated: September 2026

Available

Lowest Price

$4,581 AUD

Highest Price

$86,422 AUD

Average Price

$24,657 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

35.5%

Price Spread

64.5%

30-Day Price Trend

-25.2%

30-Day Supply Change

-11.2%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$6,312/ct

10th Percentile

$2,432

Median

$6,312

90th Percentile

$13,064

Score Distribution

52 diamonds scored across 3 quality tiers

Very Good

20 (38.5%)

Good

8 (15.4%)

Average

24 (46.2%)

Find Your Diamond

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Consider Instead

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

J I1J colour is visually identical to I to the naked eye

Save 39%

Lab-Grown I I1Same specifications, lab-grown origin

Save 71%

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