How much does a 1.50 to 1.99ct M SI2 natural cushion diamond cost?

As of November 6, 2026, 1.50 to 1.99ct M SI2 natural cushion diamonds typically cost $3,029 NZD to $7,239 NZD, with a median price of $4,357 NZD. There are currently 48 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 63%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct M SI2 Natural Cushion

Quick answer

As of November 6, 2026, there are 48 natural cushion diamonds with M colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $3,029 NZD to $7,239 NZD, with a median of $4,357 NZD. Half of all listings fall between $2,110 NZD and $3,734 NZD per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +4.0%.

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. Cushion natural stones in the index: 2,881 USD per carat, -2.5% 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

Lowest Price

$2,281 NZD

Highest Price

$14,103 NZD

Average Price

$4,837 NZD

Market Intelligence

Cross Retailer %

39.6%

Price Spread

62.9%

30-Day Price Trend

-0.8%

30-Day Supply Change

+4.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,431/ct

10th Percentile

$1,101

Median

$1,431

90th Percentile

$2,652

Score Distribution

48 diamonds scored across 4 quality tiers

Excellent

4 (8.3%)

Very Good

13 (27.1%)

Good

18 (37.5%)

Average

13 (27.1%)

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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