How much does a 5.00ct+ D I1 natural round diamond cost?

As of October 2026, 5.00ct+ D I1 natural round diamonds typically cost $86,334 NZD to $290,007 NZD, with a median price of $166,261 NZD. There are currently 4 diamonds matching this specification available across retailers.

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

About 13% of these diamonds are available at multiple retailers, with an average price spread of 11%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ D I1 Natural Round

Quick answer

As of October 2026, there are 4 natural round diamonds with D colour and I1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $86,334 NZD to $290,007 NZD, with a median of $166,261 NZD. At least 7 retailers stock this exact specification, and 13% of the stones appear at more than one of them, with an average price spread of 11%. Half of all listings fall between $16,757 NZD and $18,704 NZD per carat. The same specification in lab grown form lists at a median of about $293 NZD per carat. Over the last 30 days the median price moved -3.6% and the number of listings moved -1.5%.

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. 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

Lowest Price

$72,337 NZD

Highest Price

$437,773 NZD

Average Price

$189,552 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

12.5%

Price Spread

10.9%

30-Day Price Trend

-3.6%

30-Day Supply Change

-1.5%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$9,994/ct

10th Percentile

$8,694

Median

$9,994

90th Percentile

$10,844

Score Distribution

10 diamonds scored across 4 quality tiers

Excellent

1 (10.0%)

Very Good

3 (30.0%)

Good

1 (10.0%)

Average

5 (50.0%)

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Consider Instead

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

Lab-Grown D I1Same specifications, lab-grown origin

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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