How much does a 0.20 to 0.49ct I I1 natural marquise diamond cost?

As of November 2026, 0.20 to 0.49ct I I1 natural marquise diamonds typically cost HK$2,670 HKD to HK$5,616 HKD, with a median price of HK$3,884 HKD. There are currently 8 diamonds matching this specification available across retailers.

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

About 25% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct I I1 Natural Marquise

Quick answer

As of November 2026, there are 8 natural marquise diamonds with I colour and I1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run HK$2,670 HKD to HK$5,616 HKD, with a median of HK$3,884 HKD. At least 7 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 58%. Half of all listings fall between HK$6,045 HKD and HK$10,211 HKD per carat.

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

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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

Lowest Price

HK$1,173 HKD

Highest Price

HK$6,339 HKD

Average Price

HK$3,912 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

25.0%

Price Spread

57.6%

Price Range

Price per carat distribution across retailers

$922/ct

10th Percentile

$705

Median

$922

90th Percentile

$1,644

Score Distribution

50 diamonds scored across 4 quality tiers

Excellent

3 (6.0%)

Very Good

2 (4.0%)

Good

4 (8.0%)

Average

41 (82.0%)

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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