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 $451 AUD to $254,225 AUD, with an average price of $7,021 AUD. There are currently 505 diamonds matching this specification available across retailers.

Where can I find the best price on a J SI1 radiant diamond?

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

0.20 - 0.49ct J SI1 Lab Grown Radiant

As of April 2026, there are 505 lab grown radiant diamonds with J color and SI1 clarity in the 0.20 - 0.49ct range available across retailers worldwide. Prices range from $451 AUD to $254,225 AUD, with an average of $7,021 AUD.

Last updated: April 2026

Available

505

Lowest Price

$451 AUD

Highest Price

$254,225 AUD

Average Price

$7,021 AUD

Score Distribution

505 diamonds scored across 4 quality tiers

Excellent

11 (2.2%)

Very Good

15 (3.0%)

Good

363 (71.9%)

Average

116 (23.0%)

Find Your Diamond

Search 505 J SI1 radiant 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