How much does a 0.75 to 0.99ct G SI1 natural radiant diamond cost?

As of November 2026, 0.75 to 0.99ct G SI1 natural radiant diamonds typically cost $1,931 NZD to $5,821 NZD, with a median price of $3,114 NZD. There are currently 82 diamonds matching this specification available across retailers.

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

About 27% of these diamonds are available at multiple retailers, with an average price spread of 65%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct G SI1 Natural Radiant

Quick answer

As of November 2026, there are 82 natural radiant diamonds with G colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $1,931 NZD to $5,821 NZD, with a median of $3,114 NZD. At least 61 retailers stock this exact specification, and 27% of the stones appear at more than one of them, with an average price spread of 65%. Half of all listings fall between $2,822 NZD and $5,233 NZD per carat. The same specification in lab grown form lists at a median of about $805 NZD per carat. Over the last 30 days the median price moved -0.9% and the number of listings moved +6.5%.

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 natural stones in the index: 3,091 USD per carat, +13.2% 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

$1,013 NZD

Highest Price

$11,565 NZD

Average Price

$3,521 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

26.9%

Price Spread

65.2%

30-Day Price Trend

-0.9%

30-Day Supply Change

+6.5%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,084/ct

10th Percentile

$1,324

Median

$2,084

90th Percentile

$3,988

Score Distribution

251 diamonds scored across 4 quality tiers

Excellent

30 (12.0%)

Very Good

27 (10.8%)

Good

56 (22.3%)

Average

138 (55.0%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

G SI2SI2 inclusions are not visible without magnification

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Lab-Grown G SI1Same specifications, lab-grown origin

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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