How much does a 0.75 to 0.99ct J SI1 natural round diamond cost?

As of October 2026, 0.75 to 0.99ct J SI1 natural round diamonds typically cost HK$7,238 HKD to HK$20,216 HKD, with a median price of HK$11,158 HKD. There are currently 922 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct J SI1 Natural Round

Quick answer

As of October 2026, there are 922 natural round diamonds with J colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run HK$7,238 HKD to HK$20,216 HKD, with a median of HK$11,158 HKD. At least 62 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between HK$9,964 HKD and HK$16,563 HKD per carat. The same specification in lab grown form lists at a median of about HK$9,605 HKD per carat. Over the last 30 days the median price moved -1.6% and the number of listings moved +11.6%.

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

922

Lowest Price

HK$3,308 HKD

Highest Price

HK$34,184 HKD

Average Price

HK$12,649 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

40.0%

Price Spread

53.6%

30-Day Price Trend

-1.6%

30-Day Supply Change

+11.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,568/ct

10th Percentile

$1,087

Median

$1,568

90th Percentile

$3,164

Score Distribution

2.3K diamonds scored across 4 quality tiers

Excellent

316 (13.8%)

Very Good

486 (21.3%)

Good

519 (22.7%)

Average

966 (42.2%)

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