How much does a 5.00ct+ G SI1 lab grown radiant diamond cost?

As of November 2026, 5.00ct+ G SI1 lab grown radiant diamonds typically cost $1,244 NZD to $6,822 NZD, with a median price of $2,436 NZD. There are currently 37 diamonds matching this specification available across retailers.

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

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

5.00ct+ G SI1 Lab Grown Radiant

Quick answer

As of November 2026, there are 37 lab grown radiant diamonds with G colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $1,244 NZD to $6,822 NZD, with a median of $2,436 NZD.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Radiant lab grown stones in the index: 474 USD per carat, -2.1% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: November 2026

Available

Lowest Price

$953 NZD

Highest Price

$17,521 NZD

Average Price

$3,363 NZD

Score Distribution

74 diamonds scored across 4 quality tiers

Excellent

28 (37.8%)

Very Good

15 (20.3%)

Good

12 (16.2%)

Average

19 (25.7%)

Find Your Diamond

Search 37 G 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