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

As of September 2026, 2.00 to 2.99ct I SI2 lab grown marquise diamonds typically cost $6,606 AUD to $26,694 AUD, with a median price of $12,817 AUD. There are currently 9 diamonds matching this specification available across retailers.

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

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

2.00 to 2.99ct I SI2 Lab Grown Marquise

Quick answer

As of September 2026, there are 9 lab grown marquise diamonds with I colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $6,606 AUD to $26,694 AUD, with a median of $12,817 AUD. At least 9 retailers stock this exact specification. Half of all listings fall between $3,483 AUD and $13,091 AUD per carat. The same specification in natural form lists at a median of about $12,147 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

$6,564 AUD

Highest Price

$27,128 AUD

Average Price

$15,170 AUD

Market Intelligence

Retailers Selling

Price Spread

151.4%

Price Range

Price per carat distribution across retailers

$4,521/ct

10th Percentile

$2,261

Median

$4,521

90th Percentile

$9,594

Score Distribution

9 diamonds scored across 3 quality tiers

Very Good

2 (22.2%)

Good

1 (11.1%)

Average

6 (66.7%)

Find Your Diamond

Search 9 I SI2 marquise diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

J SI2J colour is visually identical to I to the naked eye

Save 24%

I I1I1 inclusions are not visible without magnification

Save 60%

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