How much does a 1.00 to 1.49ct I I1 lab grown heart diamond cost?

As of September 2026, 1.00 to 1.49ct I I1 lab grown heart diamonds typically cost €630 EUR to €2,672 EUR, with a median price of €2,072 EUR. There are currently 10 diamonds matching this specification available across retailers.

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

About 19% of these diamonds are available at multiple retailers, with an average price spread of 77%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I I1 Lab Grown Heart

Quick answer

As of September 2026, there are 10 lab grown heart diamonds with I colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €630 EUR to €2,672 EUR, with a median of €2,072 EUR. At least 7 retailers stock this exact specification, and 19% of the stones appear at more than one of them, with an average price spread of 77%. Half of all listings fall between €991 EUR and €1,967 EUR per carat. The same specification in natural form lists at a median of about €1,918 EUR 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. Heart lab grown stones in the index: 440 USD per carat, -9.4% 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

€607 EUR

Highest Price

€2,941 EUR

Average Price

€1,938 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

18.8%

Price Spread

76.5%

Price Range

Price per carat distribution across retailers

$1,466/ct

10th Percentile

$732

Median

$1,466

90th Percentile

$2,990

Score Distribution

10 diamonds scored across 2 quality tiers

Good

2 (20.0%)

Average

8 (80.0%)

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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