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

As of November 2026, 1.00 to 1.49ct I I1 natural round diamonds typically cost €1,172 EUR to €3,775 EUR, with a median price of €2,108 EUR. There are currently 434 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 68%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I I1 Natural Round

Quick answer

As of November 2026, there are 434 natural round diamonds with I color and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run €1,172 EUR to €3,775 EUR, with a median of €2,108 EUR. At least 31 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 68%. Half of all listings fall between €1,274 EUR and €2,432 EUR per carat. The same specification in lab grown form lists at a median of about €766 EUR per carat. Over the last 30 days the median price moved -6.2% and the number of listings moved +8.3%.

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 natural stones in the index: 2,248 USD per carat, +7.6% 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

434

Lowest Price

€555 EUR

Highest Price

€7,277 EUR

Average Price

€2,325 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

31.1%

Price Spread

67.5%

30-Day Price Trend

-6.2%

30-Day Supply Change

+8.3%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,916/ct

10th Percentile

$1,071

Median

$1,916

90th Percentile

$3,696

Score Distribution

1.2K diamonds scored across 4 quality tiers

Excellent

86 (7.4%)

Very Good

220 (19.0%)

Good

178 (15.4%)

Average

672 (58.1%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

J I1J colour is visually identical to I to the naked eye

Save 14%

Lab-Grown I I1Same specifications, lab-grown origin

Save 36%

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