How much does a 1.00 to 1.49ct D SI1 natural cushion diamond cost?

As of September 2026, 1.00 to 1.49ct D SI1 natural cushion diamonds typically cost HK$13,322 HKD to HK$44,066 HKD, with a median price of HK$22,278 HKD. There are currently 773 diamonds matching this specification available across retailers.

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

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1.00 to 1.49ct D SI1 Natural Cushion

Quick answer

As of September 2026, there are 773 natural cushion diamonds with D colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$13,322 HKD to HK$44,066 HKD, with a median of HK$22,278 HKD. At least 57 retailers stock this exact specification. Half of all listings fall between HK$16,141 HKD and HK$28,347 HKD per carat. The same specification in lab grown form lists at a median of about HK$3,131 HKD per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion natural stones in the index: 2,792 USD per carat, +1.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

773

Lowest Price

HK$5,334 HKD

Highest Price

HK$76,170 HKD

Average Price

HK$25,569 HKD

Market Intelligence

Retailers Selling

Price Spread

58.4%

Price Range

Price per carat distribution across retailers

$2,665/ct

10th Percentile

$1,746

Median

$2,665

90th Percentile

$4,652

Score Distribution

773 diamonds scored across 4 quality tiers

Excellent

114 (14.7%)

Very Good

201 (26.0%)

Good

263 (34.0%)

Average

195 (25.2%)

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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