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

As of April 2026, 0.20 - 0.49ct J SI1 lab grown round diamonds are available from $178 NZD to $188,067 NZD, with an average price of $5,040 NZD. There are currently 5,406 diamonds matching this specification available across retailers.

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0.20 - 0.49ct J SI1 Lab Grown Round

As of April 2026, there are 5,406 lab grown round diamonds with J color and SI1 clarity in the 0.20 - 0.49ct range available across retailers worldwide. Prices range from $178 NZD to $188,067 NZD, with an average of $5,040 NZD.

Last updated: April 2026

Available

5,406

Lowest Price

$178 NZD

Highest Price

$188,067 NZD

Average Price

$5,040 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

N/A

Price Spread

39.9%

30-Day Price Trend

N/A

30-Day Supply Change

N/A

Volatility (30d)

N/A

Price Range

Price per carat distribution across retailers

$961/ct

10th Percentile

$546

Median

$961

90th Percentile

$1,944

Score Distribution

5.4K diamonds scored across 4 quality tiers

Excellent

434 (8.0%)

Very Good

2,387 (44.2%)

Good

1,517 (28.1%)

Average

1,068 (19.8%)

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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