How much does a 2.00 to 2.99ct I SI2 natural marquise diamond cost?

As of November 2026, 2.00 to 2.99ct I SI2 natural marquise diamonds typically cost $12,324 NZD to $55,954 NZD, with a median price of $24,049 NZD. There are currently 179 diamonds matching this specification available across retailers.

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

About 44% of these diamonds are available at multiple retailers, with an average price spread of 47%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct I SI2 Natural Marquise

Quick answer

As of November 2026, there are 179 natural marquise diamonds with I colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $12,324 NZD to $55,954 NZD, with a median of $24,049 NZD. At least 52 retailers stock this exact specification, and 44% of the stones appear at more than one of them, with an average price spread of 47%. Half of all listings fall between $9,211 NZD and $15,199 NZD per carat. Over the last 30 days the median price moved -3.1% and the number of listings moved +24.2%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise natural stones in the index: 2,177 USD per carat, -4.2% 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

179

Lowest Price

$8,355 NZD

Highest Price

$115,117 NZD

Average Price

$29,684 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

44.3%

Price Spread

47.5%

30-Day Price Trend

-3.1%

30-Day Supply Change

+24.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$7,096/ct

10th Percentile

$3,901

Median

$7,096

90th Percentile

$9,898

Score Distribution

424 diamonds scored across 4 quality tiers

Excellent

94 (22.2%)

Very Good

125 (29.5%)

Good

86 (20.3%)

Average

119 (28.1%)

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Consider Instead

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

J SI2J colour is visually identical to I to the naked eye

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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