How much does a 1.50 to 1.99ct I SI2 lab grown oval diamond cost?

As of November 2026, 1.50 to 1.99ct I SI2 lab grown oval diamonds typically cost €707 EUR to €1,983 EUR, with a median price of €895 EUR. There are currently 136 diamonds matching this specification available across retailers.

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

About 51% of these diamonds are available at multiple retailers, with an average price spread of 91%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I SI2 Lab Grown Oval

Quick answer

As of November 2026, there are 136 lab grown oval diamonds with I color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €707 EUR to €1,983 EUR, with a median of €895 EUR. At least 15 retailers stock this exact specification, and 51% of the stones appear at more than one of them, with an average price spread of 91%. Half of all listings fall between €724 EUR and €1,434 EUR per carat. The same specification in natural form lists at a median of about €3,291 EUR per carat. Over the last 30 days the median price moved -1.4% and the number of listings moved -0.5%.

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. Oval lab grown stones in the index: 453 USD per carat, -7.4% 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

136

Lowest Price

€309 EUR

Highest Price

€4,564 EUR

Average Price

€1,298 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

51.3%

Price Spread

90.8%

30-Day Price Trend

-1.4%

30-Day Supply Change

-0.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$873/ct

10th Percentile

$740

Median

$873

90th Percentile

$1,785

Score Distribution

260 diamonds scored across 4 quality tiers

Excellent

135 (51.9%)

Very Good

2 (0.8%)

Good

79 (30.4%)

Average

44 (16.9%)

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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