How much does a 5.00ct+ I VS1 natural cushion diamond cost?

As of September 2026, 5.00ct+ I VS1 natural cushion diamonds typically cost $93,529 NZD to $274,217 NZD, with a median price of $165,395 NZD. There are currently 65 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 cushion diamond?

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5.00ct+ I VS1 Natural Cushion

Quick answer

As of September 2026, there are 65 natural cushion diamonds with I colour and VS1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $93,529 NZD to $274,217 NZD, with a median of $165,395 NZD. At least 38 retailers stock this exact specification. Half of all listings fall between $25,201 NZD and $40,894 NZD per carat. The same specification in lab grown form lists at a median of about $856 NZD per carat.

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. Cushion natural stones in the index: 2,792 USD per carat, +1.1% 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

$66,937 NZD

Highest Price

$487,635 NZD

Average Price

$186,067 NZD

Market Intelligence

Retailers Selling

Price Spread

47.8%

Price Range

Price per carat distribution across retailers

$18,896/ct

10th Percentile

$11,308

Median

$18,896

90th Percentile

$29,001

Score Distribution

65 diamonds scored across 4 quality tiers

Excellent

12 (18.5%)

Very Good

21 (32.3%)

Good

20 (30.8%)

Average

12 (18.5%)

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Consider Instead

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

J VS1J colour is visually identical to I to the naked eye

Save 36%

Lab-Grown I VS1Same specifications, lab-grown origin

Save 97%

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