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

As of October 2026, 0.50 to 0.74ct E SI2 natural round diamonds typically cost $976 NZD to $3,180 NZD, with a median price of $1,696 NZD. There are currently 7,575 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 60%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct E SI2 Natural Round

Quick answer

As of October 2026, there are 7,575 natural round diamonds with E colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $976 NZD to $3,180 NZD, with a median of $1,696 NZD. At least 61 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 60%. Half of all listings fall between $2,325 NZD and $4,056 NZD per carat. The same specification in lab grown form lists at a median of about $1,209 NZD per carat. Over the last 30 days the median price moved -3.3% and the number of listings moved +12.6%.

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

7,575

Lowest Price

$519 NZD

Highest Price

$7,396 NZD

Average Price

$1,931 NZD