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

As of September 2026, 1.00 to 1.49ct G I1 natural oval diamonds typically cost £1,078 GBP to £3,312 GBP, with a median price of £1,864 GBP. There are currently 455 diamonds matching this specification available across retailers.

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

About 41% 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 G I1 Natural Oval

Quick answer

As of September 2026, there are 455 natural oval diamonds with G colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,078 GBP to £3,312 GBP, with a median of £1,864 GBP. At least 23 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between £1,295 GBP and £1,958 GBP per carat. The same specification in lab grown form lists at a median of about £2,048 GBP per carat. Over the last 30 days the median price moved -3.9% and the number of listings moved -0.5%.

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

455

Lowest Price

£536 GBP

Highest Price

£5,809 GBP

Average Price

£2,012 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

41.4%

Price Spread

40.2%

30-Day Price Trend

-3.9%

30-Day Supply Change

-0.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,220/ct

10th Percentile

$1,393

Median

$2,220

90th Percentile

$3,058

Score Distribution

455 diamonds scored across 4 quality tiers

Excellent

26 (5.7%)

Very Good

138 (30.3%)

Good

85 (18.7%)

Average

206 (45.3%)

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Consider Instead

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

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