How much does a 1.00 to 1.49ct H I1 natural oval diamond cost?

As of September 2026, 1.00 to 1.49ct H I1 natural oval diamonds typically cost £871 GBP to £3,104 GBP, with a median price of £1,653 GBP. There are currently 401 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 41%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct H I1 Natural Oval

Quick answer

As of September 2026, there are 401 natural oval diamonds with H colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £871 GBP to £3,104 GBP, with a median of £1,653 GBP. At least 29 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between £1,154 GBP and £1,753 GBP per carat. The same specification in lab grown form lists at a median of about £1,467 GBP per carat. Over the last 30 days the median price moved -3.4% and the number of listings moved -3.3%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Oval natural stones in the index: 2,380 USD per carat, -9.6% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

401

Lowest Price

£459 GBP

Highest Price

£6,047 GBP

Average Price

£1,830 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

39.2%

Price Spread

40.8%

30-Day Price Trend

-3.4%

30-Day Supply Change

-3.3%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,982/ct

10th Percentile

$1,154

Median

$1,982

90th Percentile

$2,713

Score Distribution

401 diamonds scored across 4 quality tiers

Excellent

11 (2.7%)

Very Good

110 (27.4%)

Good

75 (18.7%)

Average

205 (51.1%)

Find Your Diamond

Search 401 H 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