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

As of October 2026, 1.50 to 1.99ct G SI2 natural cushion diamonds typically cost $5,482 NZD to $15,744 NZD, with a median price of $9,489 NZD. There are currently 269 diamonds matching this specification available across retailers.

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

About 32% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI2 Natural Cushion

Quick answer

As of October 2026, there are 269 natural cushion diamonds with G colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $5,482 NZD to $15,744 NZD, with a median of $9,489 NZD. At least 54 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between $4,754 NZD and $8,144 NZD per carat. The same specification in lab grown form lists at a median of about $934 NZD per carat. Over the last 30 days the median price moved -2.6% and the number of listings moved +5.3%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

269

Lowest Price

$3,620 NZD

Highest Price

$31,180 NZD

Average Price

$10,035 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

31.7%

Price Spread

54.7%

30-Day Price Trend

-2.6%

30-Day Supply Change

+5.3%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,490/ct

10th Percentile

$2,187

Median

$3,490

90th Percentile

$5,707

Score Distribution

744 diamonds scored across 4 quality tiers

Excellent

147 (19.8%)

Very Good

166 (22.3%)

Good

190 (25.5%)

Average

241 (32.4%)

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Consider Instead

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

H SI2H colour is visually identical to G to the naked eye

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Lab-Grown G 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