How much does a 1.50 to 1.99ct D SI2 natural marquise diamond cost?

As of November 2026, 1.50 to 1.99ct D SI2 natural marquise diamonds typically cost $10,124 NZD to $33,119 NZD, with a median price of $16,931 NZD. There are currently 161 diamonds matching this specification available across retailers.

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

About 35% of these diamonds are available at multiple retailers, with an average price spread of 42%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct D SI2 Natural Marquise

Quick answer

As of November 2026, there are 161 natural marquise diamonds with D colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $10,124 NZD to $33,119 NZD, with a median of $16,931 NZD. At least 54 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 42%. Half of all listings fall between $9,280 NZD and $14,053 NZD per carat. The same specification in lab grown form lists at a median of about $517 NZD per carat. Over the last 30 days the median price moved -0.9% and the number of listings moved +13.0%.

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

161

Lowest Price

$6,735 NZD

Highest Price

$58,371 NZD

Average Price

$19,537 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

35.2%

Price Spread

41.6%

30-Day Price Trend

-0.9%

30-Day Supply Change

+13.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$6,468/ct

10th Percentile

$4,060

Median

$6,468

90th Percentile

$9,626

Score Distribution

396 diamonds scored across 4 quality tiers

Excellent

95 (24.0%)

Very Good

116 (29.3%)

Good

75 (18.9%)

Average

110 (27.8%)

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Consider Instead

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

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Lab-Grown D 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