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

As of October 2026, 0.75 to 0.99ct D SI1 natural round diamonds typically cost HK$11,188 HKD to HK$36,733 HKD, with a median price of HK$19,340 HKD. There are currently 1,648 diamonds matching this specification available across retailers.

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

About 32% of these diamonds are available at multiple retailers, with an average price spread of 62%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct D SI1 Natural Round

Quick answer

As of October 2026, there are 1,648 natural round diamonds with D colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run HK$11,188 HKD to HK$36,733 HKD, with a median of HK$19,340 HKD. At least 68 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 62%. Half of all listings fall between HK$16,852 HKD and HK$29,953 HKD per carat. The same specification in lab grown form lists at a median of about HK$3,319 HKD per carat. Over the last 30 days the median price moved -2.3% and the number of listings moved +8.2%.

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

1,648

Lowest Price

HK$6,728 HKD

Highest Price

HK$62,682 HKD

Average Price

HK$21,970 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

32.1%

Price Spread

61.5%

30-Day Price Trend

-2.3%

30-Day Supply Change

+8.2%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,715/ct

10th Percentile

$1,810

Median

$2,715

90th Percentile

$5,138

Score Distribution

3.4K diamonds scored across 4 quality tiers

Excellent

684 (20.0%)

Very Good

775 (22.7%)

Good

1,002 (29.3%)

Average

959 (28.0%)

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Consider Instead

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

D SI2SI2 inclusions are not visible without magnification

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Lab-Grown D 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