How much does a 0.20 to 0.49ct F SI2 natural round diamond cost?

As of October 2026, 0.20 to 0.49ct F SI2 natural round diamonds typically cost $510 NZD to $1,586 NZD, with a median price of $941 NZD. There are currently 14,162 diamonds matching this specification available across retailers.

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

About 22% of these diamonds are available at multiple retailers, with an average price spread of 69%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct F SI2 Natural Round

Quick answer

As of October 2026, there are 14,162 natural round diamonds with F colour and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $510 NZD to $1,586 NZD, with a median of $941 NZD. At least 34 retailers stock this exact specification, and 22% of the stones appear at more than one of them, with an average price spread of 69%. Half of all listings fall between $1,804 NZD and $3,433 NZD per carat. The same specification in lab grown form lists at a median of about $1,677 NZD per carat. Over the last 30 days the median price moved -7.8% and the number of listings moved +11.3%.

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: October 2026

Available

14,162

Lowest Price

$166 NZD

Highest Price

$3,688 NZD

Average Price

$996 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

22.3%

Price Spread

69.1%

30-Day Price Trend

-7.8%

30-Day Supply Change

+11.3%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,324/ct

10th Percentile

$820

Median

$1,324

90th Percentile

$2,744

Score Distribution

21.3K diamonds scored across 4 quality tiers

Excellent

4,587 (21.5%)

Very Good

7,247 (34.0%)

Good

5,360 (25.1%)

Average

4,130 (19.4%)

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Consider Instead

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

F I1I1 inclusions are not visible without magnification

Save 25%

Lab-Grown F SI2Same specifications, lab-grown origin

Save 13%

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