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

As of October 2026, 5.00ct+ J I1 natural round diamonds typically cost $52,415 NZD to $154,990 NZD, with a median price of $113,458 NZD. There are currently 7 diamonds matching this specification available across retailers.

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

About 28% of these diamonds are available at multiple retailers, with an average price spread of 20%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ J I1 Natural Round

Quick answer

As of October 2026, there are 7 natural round diamonds with J colour and I1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $52,415 NZD to $154,990 NZD, with a median of $113,458 NZD. At least 15 retailers stock this exact specification, and 28% of the stones appear at more than one of them, with an average price spread of 20%. Half of all listings fall between $8,555 NZD and $10,398 NZD per carat. Over the last 30 days the median price moved -0.1% and the number of listings moved -4.3%.

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

$45,788 NZD

Highest Price

$210,929 NZD

Average Price

$107,773 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

28.1%

Price Spread

20.1%

30-Day Price Trend

-0.1%

30-Day Supply Change

-4.3%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$5,158/ct

10th Percentile

$2,424

Median

$5,158

90th Percentile

$12,500

Score Distribution

33 diamonds scored across 2 quality tiers

Good

4 (12.1%)

Average

29 (87.9%)

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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