How much does a 0.20 to 0.49ct J SI2 natural marquise diamond cost?

As of November 2026, 0.20 to 0.49ct J SI2 natural marquise diamonds typically cost HK$1,730 HKD to HK$4,864 HKD, with a median price of HK$2,762 HKD. There are currently 33 diamonds matching this specification available across retailers.

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

About 25% of these diamonds are available at multiple retailers, with an average price spread of 43%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct J SI2 Natural Marquise

Quick answer

As of November 2026, there are 33 natural marquise diamonds with J colour and SI2 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run HK$1,730 HKD to HK$4,864 HKD, with a median of HK$2,762 HKD. At least 31 retailers stock this exact specification, and 25% of the stones appear at more than one of them, with an average price spread of 43%. Half of all listings fall between HK$6,178 HKD and HK$9,346 HKD per carat. Over the last 30 days the median price moved +1.6% and the number of listings moved +24.7%.

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$1,174 HKD

Highest Price

HK$9,267 HKD

Average Price

HK$3,132 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

25.3%

Price Spread

43.1%

30-Day Price Trend

+1.6%

30-Day Supply Change

+24.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$937/ct

10th Percentile

$646

Median

$937

90th Percentile

$1,493

Score Distribution

121 diamonds scored across 4 quality tiers

Excellent

2 (1.7%)

Very Good

37 (30.6%)

Good

14 (11.6%)

Average

68 (56.2%)

Find Your Diamond

Search 33 J SI2 marquise diamonds and compare prices.

Search Diamonds

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