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

As of September 2026, 1.00 to 1.49ct G SI1 lab grown radiant diamonds typically cost HK$1,779 HKD to HK$5,322 HKD, with a median price of HK$3,590 HKD. There are currently 135 diamonds matching this specification available across retailers.

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

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

1.00 to 1.49ct G SI1 Lab Grown Radiant

Quick answer

As of September 2026, there are 135 lab grown radiant diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run HK$1,779 HKD to HK$5,322 HKD, with a median of HK$3,590 HKD. At least 29 retailers stock this exact specification. Half of all listings fall between HK$2,410 HKD and HK$4,594 HKD per carat. The same specification in natural form lists at a median of about HK$27,792 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

135

Lowest Price

HK$1,083 HKD

Highest Price

HK$21,082 HKD

Average Price

HK$3,714 HKD

Market Intelligence

Retailers Selling

Price Spread

60.2%

Price Range

Price per carat distribution across retailers

$463/ct

10th Percentile

$237

Median

$463

90th Percentile

$1,098

Score Distribution

135 diamonds scored across 4 quality tiers

Excellent

12 (8.9%)

Very Good

34 (25.2%)

Good

74 (54.8%)

Average

15 (11.1%)

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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