How much does a 1.00 to 1.49ct G I1 lab grown round diamond cost?

As of November 2026, 1.00 to 1.49ct G I1 lab grown round diamonds typically cost $685 NZD to $5,731 NZD, with a median price of $3,992 NZD. There are currently 3 diamonds matching this specification available across retailers.

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

About 21% of these diamonds are available at multiple retailers, with an average price spread of 121%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct G I1 Lab Grown Round

Quick answer

As of November 2026, there are 3 lab grown round diamonds with G colour and I1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $685 NZD to $5,731 NZD, with a median of $3,992 NZD. At least 21 retailers stock this exact specification, and 21% of the stones appear at more than one of them, with an average price spread of 121%. Half of all listings fall between $891 NZD and $3,599 NZD per carat. The same specification in natural form lists at a median of about $4,138 NZD per carat. Over the last 30 days the median price moved -41.0% and the number of listings moved -42.2%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

$316 NZD

Highest Price

$9,450 NZD

Average Price

$3,873 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

20.6%

Price Spread

120.5%

30-Day Price Trend

-41.0%

30-Day Supply Change

-42.2%

Volatility (30d)

0.09

Price Range

Price per carat distribution across retailers

$1,266/ct

10th Percentile

$196

Median

$1,266

90th Percentile

$2,445

Score Distribution

17 diamonds scored across 3 quality tiers

Very Good

4 (23.5%)

Good

4 (23.5%)

Average

9 (52.9%)

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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