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

As of October 2026, 1.50 to 1.99ct I I1 natural oval diamonds typically cost £2,267 GBP to £7,014 GBP, with a median price of £4,301 GBP. There are currently 52 diamonds matching this specification available across retailers.

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

About 18% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I I1 Natural Oval

Quick answer

As of October 2026, there are 52 natural oval diamonds with I colour and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £2,267 GBP to £7,014 GBP, with a median of £4,301 GBP. At least 27 retailers stock this exact specification, and 18% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between £1,818 GBP and £3,180 GBP per carat. Over the last 30 days the median price moved -1.9% and the number of listings moved +4.1%.

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

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Oval natural stones in the index: 2,655 USD per carat, +10.2% month on month. See the full index release

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

Last updated: October 2026

Available

Lowest Price

£918 GBP

Highest Price

£10,709 GBP

Average Price

£4,544 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

17.9%

Price Spread

54.5%

30-Day Price Trend

-1.9%

30-Day Supply Change

+4.1%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,329/ct

10th Percentile

$1,566

Median

$3,329

90th Percentile

$5,117

Score Distribution

221 diamonds scored across 4 quality tiers

Excellent

11 (5.0%)

Very Good

29 (13.1%)

Good

23 (10.4%)

Average

158 (71.5%)

Find Your Diamond

Search 52 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 17%

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