How much does a 0.20 to 0.49ct F SI1 natural round diamond cost?

As of October 2026, 0.20 to 0.49ct F SI1 natural round diamonds typically cost HK$2,397 HKD to HK$7,395 HKD, with a median price of HK$4,205 HKD. There are currently 18,003 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI1 round diamond?

About 33% of these diamonds are available at multiple retailers, with an average price spread of 57%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct F SI1 Natural Round

Quick answer

As of October 2026, there are 18,003 natural round diamonds with F colour and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run HK$2,397 HKD to HK$7,395 HKD, with a median of HK$4,205 HKD. At least 36 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 57%. Half of all listings fall between HK$9,294 HKD and HK$15,951 HKD per carat. The same specification in lab grown form lists at a median of about HK$6,684 HKD 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

18,003

Lowest Price

HK$926 HKD

Highest Price

HK$17,480 HKD

Average Price

HK$4,628 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

32.6%

Price Spread

56.8%

30-Day Price Trend

-7.8%

30-Day Supply Change

+11.3%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,494/ct

10th Percentile

$1,037

Median

$1,494

90th Percentile

$2,873

Score Distribution

28.4K diamonds scored across 4 quality tiers

Excellent

7,627 (26.8%)

Very Good

8,800 (31.0%)

Good

7,780 (27.4%)

Average

4,202 (14.8%)

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Consider Instead

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

F SI2SI2 inclusions are not visible without magnification

Save 11%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 42%

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