How much does a 1.00 to 1.49ct K SI2 natural oval diamond cost?

As of November 6, 2026, 1.00 to 1.49ct K SI2 natural oval diamonds typically cost £759 GBP to £2,212 GBP, with a median price of £1,403 GBP. There are currently 835 diamonds matching this specification available across retailers.

Where can I find the best price on a K SI2 oval diamond?

About 40% of these diamonds are available at multiple retailers, with an average price spread of 71%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct K SI2 Natural Oval

Quick answer

As of November 6, 2026, there are 835 natural oval diamonds with K colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £759 GBP to £2,212 GBP, with a median of £1,403 GBP. Half of all listings fall between £883 GBP and £1,772 GBP per carat. The same specification in lab grown form lists at a median of about £393 GBP per carat. Over the last 30 days the median price moved -1.4% and the number of listings moved +7.4%.

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

835

Lowest Price

£517 GBP

Highest Price

£5,164 GBP

Average Price

£1,449 GBP

Market Intelligence

Cross Retailer %

40.1%

Price Spread

71.0%

30-Day Price Trend

-1.4%

30-Day Supply Change

+7.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,677/ct

10th Percentile

$981

Median

$1,677

90th Percentile

$2,684

Score Distribution

835 diamonds scored across 4 quality tiers

Excellent

130 (15.6%)

Very Good

222 (26.6%)

Good

145 (17.4%)

Average

338 (40.5%)

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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