How much does a 1.00 to 1.49ct G I1 natural radiant diamond cost?

As of November 2026, 1.00 to 1.49ct G I1 natural radiant diamonds typically cost $2,158 AUD to $6,903 AUD, with a median price of $4,420 AUD. There are currently 35 diamonds matching this specification available across retailers.

Where can I find the best price on a G I1 radiant diamond?

About 14% of these diamonds are available at multiple retailers, with an average price spread of 52%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G I1 Natural Radiant

Quick answer

As of November 2026, there are 35 natural radiant diamonds with G colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,158 AUD to $6,903 AUD, with a median of $4,420 AUD. At least 28 retailers stock this exact specification, and 14% of the stones appear at more than one of them, with an average price spread of 52%. Half of all listings fall between $2,342 AUD and $4,077 AUD per carat. Over the last 30 days the median price moved -1.1% and the number of listings moved +5.5%.

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

$1,148 AUD

Highest Price

$9,194 AUD

Average Price

$4,451 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

13.8%

Price Spread

52.3%

30-Day Price Trend

-1.1%

30-Day Supply Change

+5.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,328/ct

10th Percentile

$1,150

Median

$2,328

90th Percentile

$3,371

Score Distribution

180 diamonds scored across 4 quality tiers

Excellent

10 (5.6%)

Very Good

24 (13.3%)

Good

15 (8.3%)

Average

131 (72.8%)

Find Your Diamond

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Consider Instead

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

H I1H colour is visually identical to G to the naked eye

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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