How much does a 3.00 to 4.99ct J SI1 natural radiant diamond cost?

As of November 2026, 3.00 to 4.99ct J SI1 natural radiant diamonds typically cost HK$171,749 HKD to HK$496,900 HKD, with a median price of HK$311,168 HKD. There are currently 54 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI1 radiant diamond?

About 35% of these diamonds are available at multiple retailers, with an average price spread of 15%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct J SI1 Natural Radiant

Quick answer

As of November 2026, there are 54 natural radiant diamonds with J colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$171,749 HKD to HK$496,900 HKD, with a median of HK$311,168 HKD. At least 37 retailers stock this exact specification, and 35% of the stones appear at more than one of them, with an average price spread of 15%. Half of all listings fall between HK$52,727 HKD and HK$61,243 HKD per carat. The same specification in lab grown form lists at a median of about HK$8,615 HKD per carat. Over the last 30 days the median price moved -3.5% and the number of listings moved +22.9%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

Lowest Price

HK$113,068 HKD

Highest Price

HK$722,534 HKD

Average Price

HK$326,588 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

34.7%

Price Spread

14.9%

30-Day Price Trend

-3.5%

30-Day Supply Change

+22.9%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$7,300/ct

10th Percentile

$5,167

Median

$7,300

90th Percentile

$8,135

Score Distribution

190 diamonds scored across 4 quality tiers

Excellent

10 (5.3%)

Very Good

39 (20.5%)

Good

23 (12.1%)

Average

118 (62.1%)

Find Your Diamond

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Consider Instead

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

J SI2SI2 inclusions are not visible without magnification

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Lab-Grown J SI1Same 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