How much does a 0.50 to 0.74ct H SI2 natural radiant diamond cost?

As of October 2026, 0.50 to 0.74ct H SI2 natural radiant diamonds typically cost $907 NZD to $2,761 NZD, with a median price of $1,636 NZD. There are currently 46 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI2 radiant diamond?

About 21% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct H SI2 Natural Radiant

Quick answer

As of October 2026, there are 46 natural radiant diamonds with H colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $907 NZD to $2,761 NZD, with a median of $1,636 NZD. At least 41 retailers stock this exact specification, and 21% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between $2,092 NZD and $3,451 NZD per carat. The same specification in lab grown form lists at a median of about $1,218 NZD per carat. Over the last 30 days the median price moved +1.1% and the number of listings moved +4.5%.

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: October 2026

Available

Lowest Price

$375 NZD

Highest Price

$5,342 NZD

Average Price

$1,730 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

20.5%

Price Spread

53.8%

30-Day Price Trend

+1.1%

30-Day Supply Change

+4.5%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,423/ct

10th Percentile

$927

Median

$1,423

90th Percentile

$2,644

Score Distribution

175 diamonds scored across 4 quality tiers

Excellent

8 (4.6%)

Very Good

25 (14.3%)

Good

30 (17.1%)

Average

112 (64.0%)

Find Your Diamond

Search 46 H SI2 radiant diamonds and compare prices.

Search Diamonds

Consider Instead

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

H I1I1 inclusions are not visible without magnification

Save 12%

Lab-Grown H SI2Same specifications, lab-grown origin

Save 52%

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