How much does a 3.00 to 4.99ct I IF lab grown round diamond cost?

As of October 2026, 3.00 to 4.99ct I IF lab grown round diamonds typically cost $1,396 NZD to $1,605 NZD, with a median price of $1,500 NZD. There are currently 1 diamonds matching this specification available across retailers.

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

About 50% of these diamonds are available at multiple retailers, with an average price spread of 109%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I IF Lab Grown Round

Quick answer

As of October 2026, there are 1 lab grown round diamonds with I colour and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $1,396 NZD to $1,605 NZD, with a median of $1,500 NZD. At least 23 retailers stock this exact specification, and 50% of the stones appear at more than one of them, with an average price spread of 109%. Half of all listings fall between $468 NZD and $1,305 NZD per carat. The same specification in natural form lists at a median of about $31,219 NZD per carat.

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

3.40ct Round I IF, IGI, grade A, from $1,370 NZD

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: October 2026

Available

Lowest Price

$1,370 NZD

Highest Price

$6,831 NZD

Average Price

$1,500 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

50.0%

Price Spread

109.2%

Price Range

Price per carat distribution across retailers

$432/ct

10th Percentile

$223

Median

$432

90th Percentile

$990

Score Distribution

2 diamonds scored across 2 quality tiers

Excellent

1 (50.0%)

Very Good

1 (50.0%)

Find Your Diamond

Search 1 I IF round diamonds and compare prices.

Search Diamonds

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