How much does a 1.00 to 1.49ct D SI1 lab grown radiant diamond cost?

As of September 2026, 1.00 to 1.49ct D SI1 lab grown radiant diamonds typically cost HK$1,504 HKD to HK$8,085 HKD, with a median price of HK$3,772 HKD. There are currently 176 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

1.00 to 1.49ct D SI1 Lab Grown Radiant

Quick answer

As of September 2026, there are 176 lab grown radiant diamonds with D colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$1,504 HKD to HK$8,085 HKD, with a median of HK$3,772 HKD. At least 30 retailers stock this exact specification. Half of all listings fall between HK$2,324 HKD and HK$5,337 HKD per carat. The same specification in natural form lists at a median of about HK$32,029 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. Radiant lab grown stones in the index: 473 USD per carat, -12.5% 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

176

Lowest Price

HK$863 HKD

Highest Price

HK$17,132 HKD

Average Price

HK$4,426 HKD

Market Intelligence

Retailers Selling

Price Spread

87.5%

Price Range

Price per carat distribution across retailers

$439/ct

10th Percentile

$243

Median

$439

90th Percentile

$1,043

Score Distribution

176 diamonds scored across 4 quality tiers

Excellent

45 (25.6%)

Very Good

47 (26.7%)

Good

30 (17.0%)

Average

54 (30.7%)

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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