How much does a 1.00 to 1.49ct G SI2 natural radiant diamond cost?

As of October 2026, 1.00 to 1.49ct G SI2 natural radiant diamonds typically cost £1,176 GBP to £3,691 GBP, with a median price of £2,051 GBP. There are currently 223 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI2 radiant diamond?

About 34% of these diamonds are available at multiple retailers, with an average price spread of 56%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G SI2 Natural Radiant

Quick answer

As of October 2026, there are 223 natural radiant diamonds with G colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,176 GBP to £3,691 GBP, with a median of £2,051 GBP. At least 55 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 56%. Half of all listings fall between £1,382 GBP and £2,378 GBP per carat. The same specification in lab grown form lists at a median of about £322 GBP per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +19.3%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

223

Lowest Price

£528 GBP

Highest Price

£7,494 GBP

Average Price

£2,273 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

34.5%

Price Spread

56.3%

30-Day Price Trend

-0.5%

30-Day Supply Change

+19.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,355/ct

10th Percentile

$1,490

Median

$2,355

90th Percentile

$4,298

Score Distribution

675 diamonds scored across 4 quality tiers

Excellent

125 (18.5%)

Very Good

131 (19.4%)

Good

148 (21.9%)

Average

271 (40.1%)

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Consider Instead

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

H SI2H colour is visually identical to G to the naked eye

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Lab-Grown G SI2Same specifications, lab-grown origin

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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