How much does a 1.50 to 1.99ct D IF lab grown radiant diamond cost?

As of October 2026, 1.50 to 1.99ct D IF lab grown radiant diamonds typically cost $556 NZD to $4,047 NZD, with a median price of $1,294 NZD. There are currently 681 diamonds matching this specification available across retailers.

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

About 43% of these diamonds are available at multiple retailers, with an average price spread of 110%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct D IF Lab Grown Radiant

Quick answer

As of October 2026, there are 681 lab grown radiant diamonds with D colour and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $556 NZD to $4,047 NZD, with a median of $1,294 NZD. At least 53 retailers stock this exact specification, and 43% of the stones appear at more than one of them, with an average price spread of 110%. Half of all listings fall between $601 NZD and $1,787 NZD per carat. The same specification in natural form lists at a median of about $18,804 NZD per carat. Over the last 30 days the median price moved -12.4% and the number of listings moved +29.4%.

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 lab grown stones in the index: 474 USD per carat, -2.1% 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

681

Lowest Price

$440 NZD

Highest Price

$13,067 NZD

Average Price

$1,921 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

43.0%

Price Spread

110.0%

30-Day Price Trend

-12.4%

30-Day Supply Change

+29.4%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$605/ct

10th Percentile

$229

Median

$605

90th Percentile

$1,710

Score Distribution

1.6K diamonds scored across 5 quality tiers

Exceptional

51 (3.2%)

Excellent

549 (34.2%)

Very Good

592 (36.9%)

Good

315 (19.6%)

Average

97 (6.0%)

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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