How much does a 0.50 to 0.74ct E I1 natural round diamond cost?

As of October 2026, 0.50 to 0.74ct E I1 natural round diamonds typically cost $744 NZD to $2,811 NZD, with a median price of $1,459 NZD. There are currently 574 diamonds matching this specification available across retailers.

Where can I find the best price on a E I1 round diamond?

About 36% of these diamonds are available at multiple retailers, with an average price spread of 63%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct E I1 Natural Round

Quick answer

As of October 2026, there are 574 natural round diamonds with E colour and I1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $744 NZD to $2,811 NZD, with a median of $1,459 NZD. At least 31 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 63%. Half of all listings fall between $1,874 NZD and $3,385 NZD per carat. The same specification in lab grown form lists at a median of about $675 NZD per carat. Over the last 30 days the median price moved -2.5% and the number of listings moved -1.0%.

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

574

Lowest Price

$299 NZD

Highest Price

$5,589 NZD

Average Price

$1,646 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

36.5%

Price Spread

63.3%

30-Day Price Trend

-2.5%

30-Day Supply Change

-1.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,340/ct

10th Percentile

$836

Median

$1,340

90th Percentile

$3,043

Score Distribution

1.2K diamonds scored across 4 quality tiers

Excellent

240 (20.7%)

Very Good

217 (18.7%)

Good

217 (18.7%)

Average

484 (41.8%)

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Consider Instead

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

F I1F colour is visually identical to E to the naked eye

Save 6%

Lab-Grown E I1Same specifications, lab-grown origin

Save 72%

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