How much does a 0.20 - 0.49ct I SI2 lab grown marquise diamond cost?

As of April 2026, 0.20 - 0.49ct I SI2 lab grown marquise diamonds are available from ￥29,552 JPY to ￥6,106,236 JPY, with an average price of ￥627,842 JPY. There are currently 72 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

0.20 - 0.49ct I SI2 Lab Grown Marquise

As of April 2026, there are 72 lab grown marquise diamonds with I color and SI2 clarity in the 0.20 - 0.49ct range available across retailers worldwide. Prices range from ￥29,552 JPY to ￥6,106,236 JPY, with an average of ￥627,842 JPY.

Last updated: April 2026

Available

Lowest Price

￥29,552 JPY

Highest Price

￥6,106,236 JPY

Average Price

￥627,842 JPY

Score Distribution

72 diamonds scored across 4 quality tiers

Excellent

3 (4.2%)

Very Good

30 (41.7%)

Good

23 (31.9%)

Average

16 (22.2%)

Find Your Diamond

Search 72 I 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