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

As of October 2026, 1.50 to 1.99ct G I1 natural oval diamonds typically cost £2,613 GBP to £7,594 GBP, with a median price of £4,742 GBP. There are currently 69 diamonds matching this specification available across retailers.

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

About 20% of these diamonds are available at multiple retailers, with an average price spread of 44%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G I1 Natural Oval

Quick answer

As of October 2026, there are 69 natural oval diamonds with G colour and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £2,613 GBP to £7,594 GBP, with a median of £4,742 GBP. At least 26 retailers stock this exact specification, and 20% of the stones appear at more than one of them, with an average price spread of 44%. Half of all listings fall between £2,379 GBP and £3,657 GBP per carat. Over the last 30 days the median price moved -0.6% and the number of listings moved -0.2%.

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

£1,044 GBP

Highest Price

£11,956 GBP

Average Price

£4,896 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

19.8%

Price Spread

43.7%

30-Day Price Trend

-0.6%

30-Day Supply Change

-0.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,915/ct

10th Percentile

$2,161

Median

$3,915

90th Percentile

$5,976

Score Distribution

274 diamonds scored across 4 quality tiers

Excellent

29 (10.6%)

Very Good

40 (14.6%)

Good

32 (11.7%)

Average

173 (63.1%)

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H I1H colour is visually identical to G to the naked eye

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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