How much does a 1.00 to 1.49ct D I1 lab grown round diamond cost?

As of October 2026, 1.00 to 1.49ct D I1 lab grown round diamonds typically cost €309 EUR to €3,817 EUR, with a median price of €605 EUR. There are currently 9 diamonds matching this specification available across retailers.

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

About 37% of these diamonds are available at multiple retailers, with an average price spread of 133%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct D I1 Lab Grown Round

Quick answer

As of October 2026, there are 9 lab grown round diamonds with D colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €309 EUR to €3,817 EUR, with a median of €605 EUR. At least 16 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 133%. Half of all listings fall between €399 EUR and €1,539 EUR per carat. The same specification in natural form lists at a median of about €2,647 EUR per carat. Over the last 30 days the median price moved -51.5% and the number of listings moved -46.0%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

€173 EUR

Highest Price

€4,554 EUR

Average Price

€1,296 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

37.0%

Price Spread

132.6%

30-Day Price Trend

-51.5%

30-Day Supply Change

-46.0%

Volatility (30d)

0.20

Price Range

Price per carat distribution across retailers

$957/ct

10th Percentile

$304

Median

$957

90th Percentile

$2,404

Score Distribution

19 diamonds scored across 4 quality tiers

Excellent

4 (21.1%)

Very Good

4 (21.1%)

Good

3 (15.8%)

Average

8 (42.1%)

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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