How much does a 0.20 - 0.49ct J SI1 lab grown radiant diamond cost?

As of April 2026, 0.20 - 0.49ct J SI1 lab grown radiant diamonds are available from ￥43,731 JPY to ￥24,663,600 JPY, with an average price of ￥681,161 JPY. There are currently 504 diamonds matching this specification available across retailers.

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0.20 - 0.49ct J SI1 Lab Grown Radiant

As of April 2026, there are 504 lab grown radiant diamonds with J color and SI1 clarity in the 0.20 - 0.49ct range available across retailers worldwide. Prices range from ￥43,731 JPY to ￥24,663,600 JPY, with an average of ￥681,161 JPY.

Last updated: April 2026

Available

504

Lowest Price

￥43,731 JPY

Highest Price

￥24,663,600 JPY

Average Price

￥681,161 JPY

Score Distribution

504 diamonds scored across 4 quality tiers

Excellent

10 (2.0%)

Very Good

16 (3.2%)

Good

362 (71.8%)

Average

116 (23.0%)

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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