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

As of September 2026, 2.00 to 2.99ct J SI1 natural marquise diamonds typically cost $13,072 AUD to $38,423 AUD, with a median price of $21,731 AUD. There are currently 137 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 Natural Marquise

Quick answer

As of September 2026, there are 137 natural marquise diamonds with J colour and SI1 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $13,072 AUD to $38,423 AUD, with a median of $21,731 AUD. At least 42 retailers stock this exact specification. Half of all listings fall between $7,014 AUD and $11,835 AUD per carat. The same specification in lab grown form lists at a median of about $2,858 AUD per carat.

Three of the best scored stones at this specification right now:

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 natural stones in the index: 2,114 USD per carat, -8.8% 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

137

Lowest Price

$8,576 AUD

Highest Price

$180,797 AUD

Average Price

$25,231 AUD

Market Intelligence

Retailers Selling

Price Spread

51.4%

Price Range

Price per carat distribution across retailers

$6,094/ct

10th Percentile

$3,618

Median

$6,094

90th Percentile

$9,489

Score Distribution

137 diamonds scored across 4 quality tiers

Excellent

6 (4.4%)

Very Good

26 (19.0%)

Good

38 (27.7%)

Average

67 (48.9%)

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Consider Instead

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

J SI2SI2 inclusions are not visible without magnification

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Lab-Grown J SI1Same specifications, lab-grown origin

Save 70%

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