How much does a 1.50 to 1.99ct J SI1 natural round diamond cost?

As of October 2026, 1.50 to 1.99ct J SI1 natural round diamonds typically cost HK$24,467 HKD to HK$72,672 HKD, with a median price of HK$40,500 HKD. There are currently 1,296 diamonds matching this specification available across retailers.

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

About 47% of these diamonds are available at multiple retailers, with an average price spread of 50%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J SI1 Natural Round

Quick answer

As of October 2026, there are 1,296 natural round diamonds with J colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run HK$24,467 HKD to HK$72,672 HKD, with a median of HK$40,500 HKD. At least 62 retailers stock this exact specification, and 47% of the stones appear at more than one of them, with an average price spread of 50%. Half of all listings fall between HK$19,055 HKD and HK$31,527 HKD per carat. The same specification in lab grown form lists at a median of about HK$7,032 HKD per carat. Over the last 30 days the median price moved -1.1% and the number of listings moved +13.8%.

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

1,296

Lowest Price

HK$12,767 HKD

Highest Price

HK$129,125 HKD

Average Price

HK$44,909 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

46.7%

Price Spread

50.4%

30-Day Price Trend

-1.1%

30-Day Supply Change

+13.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,154/ct

10th Percentile

$1,942

Median

$3,154

90th Percentile

$5,119

Score Distribution

3.1K diamonds scored across 4 quality tiers

Excellent

491 (15.8%)

Very Good

835 (26.9%)

Good

566 (18.2%)

Average

1,216 (39.1%)

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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

Save 9%

Lab-Grown J SI1Same specifications, lab-grown origin

Save 72%

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