How much does a 3.00 to 4.99ct J I1 lab grown round diamond cost?

As of September 2026, 3.00 to 4.99ct J I1 lab grown round diamonds typically cost HK$73,048 HKD to HK$322,612 HKD, with a median price of HK$88,936 HKD. There are currently 143 diamonds matching this specification available across retailers.

Where can I find the best price on a J I1 round diamond?

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

3.00 to 4.99ct J I1 Lab Grown Round

Quick answer

As of September 2026, there are 143 lab grown round diamonds with J colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$73,048 HKD to HK$322,612 HKD, with a median of HK$88,936 HKD. At least 2 retailers stock this exact specification. Half of all listings fall between HK$23,168 HKD and HK$24,268 HKD per carat. The same specification in natural form lists at a median of about HK$49,096 HKD per carat. Over the last 30 days the median price moved -5.7% and the number of listings moved -31.5%.

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. Round lab grown stones in the index: 438 USD per carat, -14.1% 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

143

Lowest Price

HK$70,578 HKD

Highest Price

HK$412,325 HKD

Average Price

HK$141,877 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

0.0%

Price Spread

4.7%

30-Day Price Trend

-5.7%

30-Day Supply Change

-31.5%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,971/ct

10th Percentile

$2,937

Median

$2,971

90th Percentile

$3,180

Score Distribution

143 diamonds scored across 2 quality tiers

Good

108 (75.5%)

Average

35 (24.5%)

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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