How much does a 1.50 to 1.99ct J SI2 lab grown round diamond cost?

As of October 2026, 1.50 to 1.99ct J SI2 lab grown round diamonds typically cost HK$8,223 HKD to HK$13,320 HKD, with a median price of HK$9,879 HKD. There are currently 86 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI2 round diamond?

About 54% of these diamonds are available at multiple retailers, with an average price spread of 63%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J SI2 Lab Grown Round

Quick answer

As of October 2026, there are 86 lab grown round diamonds with J colour and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run HK$8,223 HKD to HK$13,320 HKD, with a median of HK$9,879 HKD. At least 16 retailers stock this exact specification, and 54% of the stones appear at more than one of them, with an average price spread of 63%. Half of all listings fall between HK$6,126 HKD and HK$12,014 HKD per carat. The same specification in natural form lists at a median of about HK$22,537 HKD per carat. Over the last 30 days the median price moved -6.0% and the number of listings moved -4.7%.

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 lab grown stones in the index: 414 USD per carat, -5.0% 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

Lowest Price

HK$2,903 HKD

Highest Price

HK$40,888 HKD

Average Price

HK$10,904 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

53.8%

Price Spread

62.8%

30-Day Price Trend

-6.0%

30-Day Supply Change

-4.7%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,194/ct

10th Percentile

$710

Median

$1,194

90th Percentile

$2,333

Score Distribution

139 diamonds scored across 4 quality tiers

Excellent

65 (46.8%)

Very Good

7 (5.0%)

Good

58 (41.7%)

Average

9 (6.5%)

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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