How much does a 1.00 to 1.49ct I IF lab grown round diamond cost?

As of September 2026, 1.00 to 1.49ct I IF lab grown round diamonds typically cost £903 GBP to £6,875 GBP, with a median price of £3,297 GBP. There are currently 72 diamonds matching this specification available across retailers.

Where can I find the best price on a I IF round diamond?

Compare prices across retailers on Carat Hunter to see all your options.

1.00 to 1.49ct I IF Lab Grown Round

Quick answer

As of September 2026, there are 72 lab grown round diamonds with I colour and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £903 GBP to £6,875 GBP, with a median of £3,297 GBP. At least 29 retailers stock this exact specification. Half of all listings fall between £1,936 GBP and £5,035 GBP per carat. The same specification in natural form lists at a median of about £3,476 GBP per carat.

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. Round lab grown stones in the index: 438 USD per carat, -14.1% 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

Lowest Price

£158 GBP

Highest Price

£8,559 GBP

Average Price

£3,966 GBP

Market Intelligence

Retailers Selling

Price Spread

114.0%

Price Range

Price per carat distribution across retailers

$3,455/ct

10th Percentile

$504

Median

$3,455

90th Percentile

$7,600

Score Distribution

72 diamonds scored across 4 quality tiers

Excellent

12 (16.7%)

Very Good

23 (31.9%)

Good

5 (6.9%)

Average

32 (44.4%)

Find Your Diamond

Search 72 I IF round diamonds and compare prices.

Search Diamonds

Consider Instead

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

J IFJ colour is visually identical to I to the naked eye

Save 10%

I VVS1VVS1 inclusions are not visible without magnification

Save 68%

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