How much does a 1.00 to 1.49ct G SI1 natural radiant diamond cost?

As of November 6, 2026, 1.00 to 1.49ct G SI1 natural radiant diamonds typically cost $3,203 NZD to $10,865 NZD, with a median price of $5,279 NZD. There are currently 702 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G SI1 Natural Radiant

Quick answer

As of November 6, 2026, there are 702 natural radiant diamonds with G colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $3,203 NZD to $10,865 NZD, with a median of $5,279 NZD. Half of all listings fall between $3,972 NZD and $6,726 NZD per carat. The same specification in lab grown form lists at a median of about $783 NZD per carat. Over the last 30 days the median price moved -1.4% and the number of listings moved +17.6%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Radiant natural stones in the index: 3,108 USD per carat, +0.3% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

702

Lowest Price

$1,046 NZD

Highest Price

$22,249 NZD

Average Price

$6,135 NZD

Market Intelligence

Cross Retailer %

33.9%

Price Spread

54.6%

30-Day Price Trend

-1.4%

30-Day Supply Change

+17.6%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,797/ct

10th Percentile

$1,760

Median

$2,797

90th Percentile

$4,748

Score Distribution

702 diamonds scored across 4 quality tiers

Excellent

123 (17.5%)

Very Good

146 (20.8%)

Good

120 (17.1%)

Average

313 (44.6%)

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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