How much does a 1.00 to 1.49ct J I1 lab grown oval diamond cost?

As of November 2026, 1.00 to 1.49ct J I1 lab grown oval diamonds typically cost €282 EUR to €895 EUR, with a median price of €425 EUR. There are currently 1 diamonds matching this specification available across retailers.

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

About 73% of these diamonds are available at multiple retailers, with an average price spread of 97%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J I1 Lab Grown Oval

Quick answer

As of November 2026, there are 1 lab grown oval diamonds with J color and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €282 EUR to €895 EUR, with a median of €425 EUR. At least 8 retailers stock this exact specification, and 73% of the stones appear at more than one of them, with an average price spread of 97%. Half of all listings fall between €342 EUR and €1,108 EUR per carat. The same specification in natural form lists at a median of about €1,817 EUR per carat.

Three of the best scored stones at this specification right now:

1.00ct Oval J I1, UNKNOWN, grade D, from €568 EUR

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

Lowest Price

€282 EUR

Highest Price

€1,123 EUR

Average Price

€542 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

73.3%

Price Spread

96.7%

Price Range

Price per carat distribution across retailers

$885/ct

10th Percentile

$329

Median

$885

90th Percentile

$1,255

Score Distribution

4 diamonds scored across 2 quality tiers

Good

2 (50.0%)

Average

2 (50.0%)

Find Your Diamond

Search 1 J I1 oval diamonds and compare prices.

Search Diamonds

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