How much does a 1.50 to 1.99ct I IF natural round diamond cost?

As of October 2026, 1.50 to 1.99ct I IF natural round diamonds typically cost €5,470 EUR to €19,384 EUR, with a median price of €8,397 EUR. There are currently 218 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 47%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I IF Natural Round

Quick answer

As of October 2026, there are 218 natural round diamonds with I colour and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run €5,470 EUR to €19,384 EUR, with a median of €8,397 EUR. At least 59 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 47%. Half of all listings fall between €4,617 EUR and €7,287 EUR per carat. The same specification in lab grown form lists at a median of about €411 EUR per carat. Over the last 30 days the median price moved -2.3% and the number of listings moved +8.7%.

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: October 2026

Available

218

Lowest Price

€3,303 EUR

Highest Price

€28,316 EUR

Average Price

€10,563 EUR

Market Intelligence

Retailers Selling

Cross Retailer %

36.1%

Price Spread

47.2%

30-Day Price Trend

-2.3%

30-Day Supply Change

+8.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$6,323/ct

10th Percentile

$4,409

Median

$6,323

90th Percentile

$10,466

Score Distribution

676 diamonds scored across 4 quality tiers

Excellent

198 (29.3%)

Very Good

132 (19.5%)

Good

101 (14.9%)

Average

245 (36.2%)

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Consider Instead

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

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

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Lab-Grown I IFSame specifications, lab-grown origin

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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