How much does a 2.00 to 2.99ct G SI2 natural marquise diamond cost?

As of November 2026, 2.00 to 2.99ct G SI2 natural marquise diamonds typically cost $10,973 AUD to $48,782 AUD, with a median price of $21,290 AUD. There are currently 167 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 50%. A comparison tool like Carat Hunter lets you see all the prices side by side.

2.00 to 2.99ct G SI2 Natural Marquise

Quick answer

As of November 2026, there are 167 natural marquise diamonds with G colour and SI2 clarity in the 2.00 to 2.99ct range available across retailers worldwide. Prices typically run $10,973 AUD to $48,782 AUD, with a median of $21,290 AUD. At least 54 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 50%. Half of all listings fall between $8,007 AUD and $13,443 AUD per carat. The same specification in lab grown form lists at a median of about $389 AUD per carat. Over the last 30 days the median price moved -3.1% and the number of listings moved +21.5%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise natural stones in the index: 2,177 USD per carat, -4.2% 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: November 2026

Available

167

Lowest Price

$5,479 AUD

Highest Price

$97,286 AUD

Average Price

$25,100 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

38.1%

Price Spread

49.6%

30-Day Price Trend

-3.1%

30-Day Supply Change

+21.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$7,677/ct

10th Percentile

$4,398

Median

$7,677

90th Percentile

$11,200

Score Distribution

475 diamonds scored across 4 quality tiers

Excellent

116 (24.4%)

Very Good

131 (27.6%)

Good

86 (18.1%)

Average

142 (29.9%)

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Consider Instead

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

H SI2H colour is visually identical to G to the naked eye

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Lab-Grown G SI2Same specifications, lab-grown origin

Save 96%

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