How much does a 1.50 to 1.99ct G I1 natural round diamond cost?

As of October 2026, 1.50 to 1.99ct G I1 natural round diamonds typically cost $4,928 NZD to $19,090 NZD, with a median price of $10,606 NZD. There are currently 247 diamonds matching this specification available across retailers.

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

About 26% 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.

1.50 to 1.99ct G I1 Natural Round

Quick answer

As of October 2026, there are 247 natural round diamonds with G colour and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $4,928 NZD to $19,090 NZD, with a median of $10,606 NZD. At least 31 retailers stock this exact specification, and 26% of the stones appear at more than one of them, with an average price spread of 65%. Half of all listings fall between $4,263 NZD and $8,192 NZD per carat. The same specification in lab grown form lists at a median of about $768 NZD per carat. Over the last 30 days the median price moved -5.4% and the number of listings moved +9.2%.

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 natural stones in the index: 2,248 USD per carat, +7.6% 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: October 2026

Available

247

Lowest Price

$1,587 NZD

Highest Price

$33,092 NZD

Average Price

$11,282 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

25.7%

Price Spread

64.9%

30-Day Price Trend

-5.4%

30-Day Supply Change

+9.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$3,411/ct

10th Percentile

$1,709

Median

$3,411

90th Percentile

$5,879

Score Distribution

826 diamonds scored across 4 quality tiers

Excellent

84 (10.2%)

Very Good

161 (19.5%)

Good

128 (15.5%)

Average

453 (54.8%)

Find Your Diamond

Search 247 G I1 round diamonds and compare prices.

Search Diamonds

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

Save 8%

Lab-Grown G I1Same specifications, lab-grown origin

Save 87%

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