How much does a 1.50 to 1.99ct K I1 natural oval diamond cost?

As of November 6, 2026, 1.50 to 1.99ct K I1 natural oval diamonds typically cost $2,600 AUD to $7,885 AUD, with a median price of $4,470 AUD. There are currently 42 diamonds matching this specification available across retailers.

Where can I find the best price on a K I1 oval diamond?

About 45% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct K I1 Natural Oval

Quick answer

As of November 6, 2026, there are 42 natural oval diamonds with K colour and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $2,600 AUD to $7,885 AUD, with a median of $4,470 AUD. Half of all listings fall between $2,382 AUD and $4,102 AUD per carat. The same specification in lab grown form lists at a median of about $2,166 AUD per carat. Over the last 30 days the median price moved -2.4% and the number of listings moved +9.2%.

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. Oval natural stones in the index: 2,512 USD per carat, -7.2% 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

$1,390 AUD

Highest Price

$12,973 AUD

Average Price

$4,938 AUD

Market Intelligence

Cross Retailer %

45.2%

Price Spread

58.1%

30-Day Price Trend

-2.4%

30-Day Supply Change

+9.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,034/ct

10th Percentile

$1,148

Median

$2,034

90th Percentile

$3,415

Score Distribution

42 diamonds scored across 4 quality tiers

Excellent

7 (16.7%)

Very Good

11 (26.2%)

Good

9 (21.4%)

Average

15 (35.7%)

Find Your Diamond

Search 42 K I1 oval diamonds and compare prices.

Search Diamonds

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