How much does a 1.00 to 1.49ct K SI1 natural round diamond cost?

As of November 6, 2026, 1.00 to 1.49ct K SI1 natural round diamonds typically cost HK$11,258 HKD to HK$32,128 HKD, with a median price of HK$18,074 HKD. There are currently 2,004 diamonds matching this specification available across retailers.

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

About 37% 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.

1.00 to 1.49ct K SI1 Natural Round

Quick answer

As of November 6, 2026, there are 2,004 natural round diamonds with K colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$11,258 HKD to HK$32,128 HKD, with a median of HK$18,074 HKD. Half of all listings fall between HK$13,003 HKD and HK$21,662 HKD per carat. The same specification in lab grown form lists at a median of about HK$3,146 HKD per carat. Over the last 30 days the median price moved -0.4% and the number of listings moved +2.0%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Round natural stones in the index: 2,124 USD per carat, -6.9% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

2,004

Lowest Price

HK$5,992 HKD

Highest Price

HK$69,343 HKD

Average Price

HK$20,140 HKD

Market Intelligence

Cross Retailer %

37.2%

Price Spread

54.1%

30-Day Price Trend

-0.4%

30-Day Supply Change

+2.0%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,040/ct

10th Percentile

$1,345

Median

$2,040

90th Percentile

$3,544

Score Distribution

2.0K diamonds scored across 4 quality tiers

Excellent

399 (19.9%)

Very Good

482 (24.1%)

Good

284 (14.2%)

Average

839 (41.9%)

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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