How much does a 1.50 to 1.99ct K I2 natural round diamond cost?

As of November 6, 2026, 1.50 to 1.99ct K I2 natural round diamonds typically cost $3,024 NZD to $7,940 NZD, with a median price of $5,033 NZD. There are currently 31 diamonds matching this specification available across retailers.

Where can I find the best price on a K I2 round diamond?

About 55% of these diamonds are available at multiple retailers, with an average price spread of 48%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct K I2 Natural Round

Quick answer

As of November 6, 2026, there are 31 natural round diamonds with K colour and I2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $3,024 NZD to $7,940 NZD, with a median of $5,033 NZD. Half of all listings fall between $2,717 NZD and $4,280 NZD per carat. Over the last 30 days the median price moved -2.5% and the number of listings moved +4.1%.

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. Round natural stones in the index: 2,124 USD per carat, -6.9% 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

$2,215 NZD

Highest Price

$18,961 NZD

Average Price

$5,483 NZD

Market Intelligence

Cross Retailer %

54.8%

Price Spread

47.8%

30-Day Price Trend

-2.5%

30-Day Supply Change

+4.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,839/ct

10th Percentile

$1,126

Median

$1,839

90th Percentile

$2,617

Score Distribution

31 diamonds scored across 4 quality tiers

Excellent

1 (3.2%)

Very Good

16 (51.6%)

Good

11 (35.5%)

Average

3 (9.7%)

Find Your Diamond

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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