How much does a 5.00ct+ I I1 natural oval diamond cost?

As of September 2026, 5.00ct+ I I1 natural oval diamonds typically cost $22,910 NZD to $104,963 NZD, with a median price of $51,792 NZD. There are currently 15 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 45%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ I I1 Natural Oval

Quick answer

As of September 2026, there are 15 natural oval diamonds with I colour and I1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $22,910 NZD to $104,963 NZD, with a median of $51,792 NZD. At least 6 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 45%. Half of all listings fall between $4,345 NZD and $6,959 NZD per carat. Over the last 30 days the median price moved -67.4% and the number of listings moved -76.1%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Oval natural stones in the index: 2,380 USD per carat, -9.6% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

$18,990 NZD

Highest Price

$248,488 NZD

Average Price

$60,649 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

38.5%

Price Spread

44.5%

30-Day Price Trend

-67.4%

30-Day Supply Change

-76.1%

Volatility (30d)

0.17

Price Range

Price per carat distribution across retailers

$3,522/ct

10th Percentile

$2,451

Median

$3,522

90th Percentile

$4,717

Score Distribution

15 diamonds scored across 3 quality tiers

Very Good

6 (40.0%)

Good

4 (26.7%)

Average

5 (33.3%)

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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