How much does a 1.50 to 1.99ct I VS1 natural cushion diamond cost?

As of October 2026, 1.50 to 1.99ct I VS1 natural cushion diamonds typically cost $6,582 NZD to $17,815 NZD, with a median price of $10,344 NZD. There are currently 424 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 cushion diamond?

About 30% 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 I VS1 Natural Cushion

Quick answer

As of October 2026, there are 424 natural cushion diamonds with I colour and VS1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $6,582 NZD to $17,815 NZD, with a median of $10,344 NZD. At least 61 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between $6,028 NZD and $10,360 NZD per carat. The same specification in lab grown form lists at a median of about $1,018 NZD per carat. Over the last 30 days the median price moved -0.9% 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

424

Lowest Price

$4,209 NZD

Highest Price

$36,964 NZD

Average Price

$11,490 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

30.3%

Price Spread

55.1%

30-Day Price Trend

-0.9%

30-Day Supply Change

+5.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$4,428/ct

10th Percentile

$2,764

Median

$4,428

90th Percentile

$7,204

Score Distribution

1.2K diamonds scored across 4 quality tiers

Excellent

237 (19.8%)

Very Good

292 (24.4%)

Good

320 (26.8%)

Average

346 (29.0%)

Find Your Diamond

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Consider Instead

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

J VS1J colour is visually identical to I to the naked eye

Save 32%

Lab-Grown I VS1Same specifications, lab-grown origin

Save 87%

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