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

As of October 2026, 1.00 to 1.49ct G I1 natural oval diamonds typically cost £1,047 GBP to £3,441 GBP, with a median price of £1,896 GBP. There are currently 168 diamonds matching this specification available across retailers.

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

About 32% 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.

1.00 to 1.49ct G I1 Natural Oval

Quick answer

As of October 2026, there are 168 natural oval diamonds with G colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,047 GBP to £3,441 GBP, with a median of £1,896 GBP. At least 26 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between £1,146 GBP and £1,986 GBP per carat. The same specification in lab grown form lists at a median of about £1,094 GBP per carat. Over the last 30 days the median price moved -6.9% and the number of listings moved +17.4%.

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

168

Lowest Price

£462 GBP

Highest Price

£6,351 GBP

Average Price

£2,066 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

31.8%

Price Spread

54.0%

30-Day Price Trend

-6.9%

30-Day Supply Change

+17.4%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$2,084/ct

10th Percentile

$1,246

Median

$2,084

90th Percentile

$3,618

Score Distribution

517 diamonds scored across 4 quality tiers

Excellent

41 (7.9%)

Very Good

104 (20.1%)

Good

83 (16.1%)

Average

289 (55.9%)

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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

Save 8%

Lab-Grown G I1Same specifications, lab-grown origin

Save 30%

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