How much does a 0.50 to 0.74ct F SI2 lab grown princess diamond cost?

As of October 2026, 0.50 to 0.74ct F SI2 lab grown princess diamonds typically cost £75 GBP to £143 GBP, with a median price of £106 GBP. There are currently 2 diamonds matching this specification available across retailers.

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

About 60% of these diamonds are available at multiple retailers, with an average price spread of 89%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct F SI2 Lab Grown Princess

Quick answer

As of October 2026, there are 2 lab grown princess diamonds with F colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run £75 GBP to £143 GBP, with a median of £106 GBP. At least 17 retailers stock this exact specification, and 60% of the stones appear at more than one of them, with an average price spread of 89%. Half of all listings fall between £142 GBP and £378 GBP per carat. The same specification in natural form lists at a median of about £814 GBP per carat. Over the last 30 days the median price moved +0.2% and the number of listings moved +16.6%.

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 lab grown stones in the index: 461 USD per carat, -4.8% 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

£75 GBP

Highest Price

£685 GBP

Average Price

£108 GBP

Market Intelligence

Retailers Selling

Cross Retailer %

60.0%

Price Spread

89.2%

30-Day Price Trend

+0.2%

30-Day Supply Change

+16.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$352/ct

10th Percentile

$157

Median

$352

90th Percentile

$583

Score Distribution

5 diamonds scored across 2 quality tiers

Excellent

2 (40.0%)

Good

3 (60.0%)

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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