How much does a 1.00 to 1.49ct J I1 natural round diamond cost?

As of September 2026, 1.00 to 1.49ct J I1 natural round diamonds typically cost €963 EUR to €2,873 EUR, with a median price of €1,670 EUR. There are currently 1,108 diamonds matching this specification available across retailers.

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

About 58% of these diamonds are available at multiple retailers, with an average price spread of 51%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct J I1 Natural Round

Quick answer

As of September 2026, there are 1,108 natural round diamonds with J colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €963 EUR to €2,873 EUR, with a median of €1,670 EUR. At least 27 retailers stock this exact specification, and 58% of the stones appear at more than one of them, with an average price spread of 51%. Half of all listings fall between €1,164 EUR and €1,931 EUR per carat. The same specification in lab grown form lists at a median of about €1,865 EUR per carat. Over the last 30 days the median price moved -3.4% and the number of listings moved +12.1%.

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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

1,108

Lowest Price

€567 EUR

Highest Price

€9,007 EUR

Average Price

€1,843 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

57.7%

Price Spread

51.1%

30-Day Price Trend

-3.4%

30-Day Supply Change

+12.1%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,637/ct

10th Percentile

$996

Median

$1,637

90th Percentile

$2,700

Score Distribution

1.1K diamonds scored across 4 quality tiers

Excellent

49 (4.4%)

Very Good

341 (30.8%)

Good

290 (26.2%)

Average

427 (38.6%)

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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