How much does a 0.75 to 0.99ct D SI2 natural marquise diamond cost?

As of October 2026, 0.75 to 0.99ct D SI2 natural marquise diamonds typically cost $2,800 NZD to $6,718 NZD, with a median price of $4,119 NZD. There are currently 121 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 50%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct D SI2 Natural Marquise

Quick answer

As of October 2026, there are 121 natural marquise diamonds with D colour and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $2,800 NZD to $6,718 NZD, with a median of $4,119 NZD. At least 53 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 50%. Half of all listings fall between $3,890 NZD and $6,297 NZD per carat. The same specification in lab grown form lists at a median of about $828 NZD per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +0.8%.

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

121

Lowest Price

$1,985 NZD

Highest Price

$13,264 NZD

Average Price

$4,636 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

28.5%

Price Spread

49.7%

30-Day Price Trend

-0.5%

30-Day Supply Change

+0.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,730/ct

10th Percentile

$1,877

Median

$2,730

90th Percentile

$4,750

Score Distribution

347 diamonds scored across 4 quality tiers

Excellent

52 (15.0%)

Very Good

84 (24.2%)

Good

75 (21.6%)

Average

136 (39.2%)

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Consider Instead

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

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