How much does a 0.75 to 0.99ct G SI2 natural princess diamond cost?

As of October 2026, 0.75 to 0.99ct G SI2 natural princess diamonds typically cost £617 GBP to £1,768 GBP, with a median price of £942 GBP. There are currently 159 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 67%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct G SI2 Natural Princess

Quick answer

As of October 2026, there are 159 natural princess diamonds with G colour and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run £617 GBP to £1,768 GBP, with a median of £942 GBP. At least 53 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 67%. Half of all listings fall between £840 GBP and £1,552 GBP per carat. The same specification in lab grown form lists at a median of about £571 GBP per carat. Over the last 30 days the median price moved -7.3% and the number of listings moved +15.5%.

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. Princess natural stones in the index: 2,158 USD per carat, +5.7% 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

159

Lowest Price

£454 GBP

Highest Price

£3,928 GBP

Average Price

£1,082 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

31.1%

Price Spread

67.1%

30-Day Price Trend

-7.3%

30-Day Supply Change

+15.5%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,414/ct

10th Percentile

$1,000

Median

$1,414

90th Percentile

$3,078

Score Distribution

415 diamonds scored across 4 quality tiers

Excellent

65 (15.7%)

Very Good

91 (21.9%)

Good

110 (26.5%)

Average

149 (35.9%)

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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

Save 8%

Lab-Grown G SI2Same specifications, lab-grown origin

Save 46%

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