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

As of September 2026, 1.00 to 1.49ct I I1 natural oval diamonds typically cost £862 GBP to £3,143 GBP, with a median price of £1,713 GBP. There are currently 343 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I I1 Natural Oval

Quick answer

As of September 2026, there are 343 natural oval diamonds with I colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £862 GBP to £3,143 GBP, with a median of £1,713 GBP. At least 28 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between £1,231 GBP and £1,862 GBP per carat. The same specification in lab grown form lists at a median of about £1,571 GBP per carat. Over the last 30 days the median price moved -3.3% and the number of listings moved -3.4%.

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

343

Lowest Price

£485 GBP

Highest Price

£5,145 GBP

Average Price

£1,881 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

39.1%

Price Spread

40.4%

30-Day Price Trend

-3.3%

30-Day Supply Change

-3.4%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,983/ct

10th Percentile

$1,155

Median

$1,983

90th Percentile

$2,713

Score Distribution

343 diamonds scored across 4 quality tiers

Excellent

7 (2.0%)

Very Good

89 (25.9%)

Good

62 (18.1%)

Average

185 (53.9%)

Find Your Diamond

Search 343 I I1 oval diamonds and compare prices.

Search Diamonds

Consider Instead

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

J I1J colour is visually identical to I to the naked eye

Save 18%

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