How much does a 2.00 to 2.99ct J SI1 lab grown marquise diamond cost?

As of September 2026, 2.00 to 2.99ct J SI1 lab grown marquise diamonds typically cost HK$26,242 HKD to HK$42,066 HKD, with a median price of HK$33,068 HKD. There are currently 331 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI1 marquise diamond?

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2.00 to 2.99ct J SI1 Lab Grown Marquise

Quick answer

As of September 2026, there are 331 lab grown marquise diamonds with J colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run HK$26,242 HKD to HK$42,066 HKD, with a median of HK$33,068 HKD. At least 3 retailers stock this exact specification. Half of all listings fall between HK$12,859 HKD and HK$14,217 HKD per carat. The same specification in natural form lists at a median of about HK$54,612 HKD per carat.

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. Marquise lab grown stones in the index: 500 USD per carat, -14.7% 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

331

Lowest Price

HK$2,981 HKD

Highest Price

HK$145,641 HKD

Average Price

HK$34,892 HKD

Market Intelligence

Retailers Selling

Price Spread

9.6%

Price Range

Price per carat distribution across retailers

$1,799/ct

10th Percentile

$1,637

Median

$1,799

90th Percentile

$1,820

Score Distribution

331 diamonds scored across 3 quality tiers

Very Good

17 (5.1%)

Good

226 (68.3%)

Average

88 (26.6%)

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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