How much does a 5.00ct+ I SI2 lab grown radiant diamond cost?

As of April 2026, 5.00ct+ I SI2 lab grown radiant diamonds are available from $307 NZD to $106,847 NZD, with an average price of $12,258 NZD. There are currently 108 diamonds matching this specification available across retailers.

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

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5.00ct+ I SI2 Lab Grown Radiant

As of April 2026, there are 108 lab grown radiant diamonds with I color and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices range from $307 NZD to $106,847 NZD, with an average of $12,258 NZD.

Last updated: April 2026

Available

108

Lowest Price

$307 NZD

Highest Price

$106,847 NZD

Average Price

$12,258 NZD

Score Distribution

108 diamonds scored across 3 quality tiers

Very Good

9 (8.3%)

Good

12 (11.1%)

Average

87 (80.6%)

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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