How much does a 3.00 to 4.99ct G I1 natural marquise diamond cost?

As of September 2026, 3.00 to 4.99ct G I1 natural marquise diamonds typically cost HK$90,562 HKD to HK$542,574 HKD, with a median price of HK$350,463 HKD. There are currently 13 diamonds matching this specification available across retailers.

Where can I find the best price on a G I1 marquise diamond?

About 25% of these diamonds are available at multiple retailers, with an average price spread of 25%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G I1 Natural Marquise

Quick answer

As of September 2026, there are 13 natural marquise diamonds with G colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$90,562 HKD to HK$542,574 HKD, with a median of HK$350,463 HKD. At least 8 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 25%. Half of all listings fall between HK$26,292 HKD and HK$33,904 HKD per carat. Over the last 30 days the median price moved -23.0% and the number of listings moved -63.6%.

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

Lowest Price

HK$78,949 HKD

Highest Price

HK$600,982 HKD

Average Price

HK$297,654 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

25.0%

Price Spread

24.5%

30-Day Price Trend

-23.0%

30-Day Supply Change

-63.6%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$3,959/ct

10th Percentile

$2,470

Median

$3,959

90th Percentile

$4,865

Score Distribution

13 diamonds scored across 3 quality tiers

Very Good

7 (53.8%)

Good

2 (15.4%)

Average

4 (30.8%)

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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