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

As of November 6, 2026, 2.00 to 2.99ct K SI2 natural marquise diamonds typically cost $8,430 NZD to $21,087 NZD, with a median price of $15,473 NZD. There are currently 123 diamonds matching this specification available across retailers.

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

About 46% of these diamonds are available at multiple retailers, with an average price spread of 46%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct K SI2 Natural Marquise

Quick answer

As of November 6, 2026, there are 123 natural marquise diamonds with K colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $8,430 NZD to $21,087 NZD, with a median of $15,473 NZD. Half of all listings fall between $4,997 NZD and $8,501 NZD per carat. Over the last 30 days the median price moved -3.9% and the number of listings moved +23.9%.

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 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

123

Lowest Price

$6,776 NZD

Highest Price

$39,404 NZD

Average Price

$15,250 NZD

Market Intelligence

Cross Retailer %

45.5%

Price Spread

46.3%

30-Day Price Trend

-3.9%

30-Day Supply Change

+23.9%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$4,259/ct

10th Percentile

$2,309

Median

$4,259

90th Percentile

$5,439

Score Distribution

123 diamonds scored across 4 quality tiers

Excellent

16 (13.0%)

Very Good

53 (43.1%)

Good

31 (25.2%)

Average

23 (18.7%)

Find Your Diamond

Search 123 K SI2 marquise diamonds and compare prices.

Search Diamonds

Consider Instead

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

L SI2

Save 24%

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