How much does a 1.50 to 1.99ct I I1 lab grown round diamond cost?

As of November 2026, 1.50 to 1.99ct I I1 lab grown round diamonds typically cost €211 EUR to €5,184 EUR, with a median price of €827 EUR. There are currently 6 diamonds matching this specification available across retailers.

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

About 47% of these diamonds are available at multiple retailers, with an average price spread of 312%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I I1 Lab Grown Round

Quick answer

As of November 2026, there are 6 lab grown round diamonds with I color and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €211 EUR to €5,184 EUR, with a median of €827 EUR. At least 18 retailers stock this exact specification, and 47% of the stones appear at more than one of them, with an average price spread of 312%. Half of all listings fall between €218 EUR and €1,908 EUR per carat. The same specification in natural form lists at a median of about €2,806 EUR per carat. Over the last 30 days the median price moved -76.9% and the number of listings moved -10.9%.

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: November 2026

Available

Lowest Price

€186 EUR

Highest Price

€7,447 EUR

Average Price

€1,777 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

46.7%

Price Spread

312.5%

30-Day Price Trend

-76.9%

30-Day Supply Change

-10.9%

Volatility (30d)

0.45

Price Range

Price per carat distribution across retailers

$604/ct

10th Percentile

$145

Median

$604

90th Percentile

$3,525

Score Distribution

9 diamonds scored across 3 quality tiers

Very Good

5 (55.6%)

Good

3 (33.3%)

Average

1 (11.1%)

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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