How much does a 2.00 to 2.99ct J SI2 lab grown marquise diamond cost?

As of September 2026, 2.00 to 2.99ct J SI2 lab grown marquise diamonds typically cost $10,060 AUD to $24,989 AUD, with a median price of $13,977 AUD. There are currently 12 diamonds matching this specification available across retailers.

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

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2.00 to 2.99ct J SI2 Lab Grown Marquise

Quick answer

As of September 2026, there are 12 lab grown marquise diamonds with J colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $10,060 AUD to $24,989 AUD, with a median of $13,977 AUD. At least 7 retailers stock this exact specification. Half of all listings fall between $4,656 AUD and $6,736 AUD per carat. The same specification in natural form lists at a median of about $8,725 AUD 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

Lowest Price

$9,642 AUD

Highest Price

$26,230 AUD

Average Price

$16,050 AUD

Market Intelligence

Retailers Selling

Price Spread

39.4%

Price Range

Price per carat distribution across retailers

$3,434/ct

10th Percentile

$2,927

Median

$3,434

90th Percentile

$5,131

Score Distribution

12 diamonds scored across 3 quality tiers

Very Good

1 (8.3%)

Good

1 (8.3%)

Average

10 (83.3%)

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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