How much does a 0.75 to 0.99ct J SI2 natural radiant diamond cost?

As of October 2026, 0.75 to 0.99ct J SI2 natural radiant diamonds typically cost HK$6,458 HKD to HK$15,327 HKD, with a median price of HK$10,173 HKD. There are currently 25 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI2 radiant diamond?

About 23% of these diamonds are available at multiple retailers, with an average price spread of 63%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct J SI2 Natural Radiant

Quick answer

As of October 2026, there are 25 natural radiant diamonds with J colour and SI2 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run HK$6,458 HKD to HK$15,327 HKD, with a median of HK$10,173 HKD. At least 41 retailers stock this exact specification, and 23% of the stones appear at more than one of them, with an average price spread of 63%. Half of all listings fall between HK$8,269 HKD and HK$15,599 HKD per carat. Over the last 30 days the median price moved -1.3% and the number of listings moved +23.5%.

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: October 2026

Available

Lowest Price

HK$3,521 HKD

Highest Price

HK$33,811 HKD

Average Price

HK$10,743 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

23.2%

Price Spread

62.5%

30-Day Price Trend

-1.3%

30-Day Supply Change

+23.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,494/ct

10th Percentile

$854

Median

$1,494

90th Percentile

$2,672

Score Distribution

150 diamonds scored across 4 quality tiers

Excellent

10 (6.7%)

Very Good

11 (7.3%)

Good

23 (15.3%)

Average

106 (70.7%)

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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