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

As of October 2026, 0.50 to 0.74ct E SI2 natural radiant diamonds typically cost $990 NZD to $2,645 NZD, with a median price of $1,600 NZD. There are currently 71 diamonds matching this specification available across retailers.

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

About 32% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct E SI2 Natural Radiant

Quick answer

As of October 2026, there are 71 natural radiant diamonds with E colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $990 NZD to $2,645 NZD, with a median of $1,600 NZD. At least 51 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between $2,220 NZD and $3,774 NZD per carat. The same specification in lab grown form lists at a median of about $1,228 NZD per carat. Over the last 30 days the median price moved +1.6% and the number of listings moved +5.7%.

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

$608 NZD

Highest Price

$5,669 NZD

Average Price

$1,748 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

32.2%

Price Spread

54.9%

30-Day Price Trend

+1.6%

30-Day Supply Change

+5.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,591/ct

10th Percentile

$1,044

Median

$1,591

90th Percentile

$3,018

Score Distribution

198 diamonds scored across 4 quality tiers

Excellent

39 (19.7%)

Very Good

40 (20.2%)

Good

44 (22.2%)

Average

75 (37.9%)

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Consider Instead

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

F SI2F colour is visually identical to E to the naked eye

Save 5%

Lab-Grown E SI2Same specifications, lab-grown origin

Save 57%

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