How much does a 1.00 to 1.49ct G SI2 natural marquise diamond cost?

As of November 2026, 1.00 to 1.49ct G SI2 natural marquise diamonds typically cost $2,109 AUD to $6,895 AUD, with a median price of $3,857 AUD. There are currently 702 diamonds matching this specification available across retailers.

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

About 42% of these diamonds are available at multiple retailers, with an average price spread of 53%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G SI2 Natural Marquise

Quick answer

As of November 2026, there are 702 natural marquise diamonds with G colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,109 AUD to $6,895 AUD, with a median of $3,857 AUD. At least 56 retailers stock this exact specification, and 42% of the stones appear at more than one of them, with an average price spread of 53%. Half of all listings fall between $3,312 AUD and $5,568 AUD per carat. Over the last 30 days the median price moved +0.1% and the number of listings moved +14.4%.

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

702

Lowest Price

$1,261 AUD

Highest Price

$22,318 AUD

Average Price

$4,267 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

42.0%

Price Spread

53.1%

30-Day Price Trend

+0.1%

30-Day Supply Change

+14.4%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,976/ct

10th Percentile

$1,797

Median

$2,976

90th Percentile

$4,944

Score Distribution

1.5K diamonds scored across 4 quality tiers

Excellent

385 (25.3%)

Very Good

476 (31.3%)

Good

340 (22.4%)

Average

319 (21.0%)

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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