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

As of September 2026, 5.00ct+ I VS1 natural round diamonds typically cost £50,677 GBP to £260,617 GBP, with a median price of £90,379 GBP. There are currently 327 diamonds matching this specification available across retailers.

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

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5.00ct+ I VS1 Natural Round

Quick answer

As of September 2026, there are 327 natural round diamonds with I colour and VS1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run £50,677 GBP to £260,617 GBP, with a median of £90,379 GBP. At least 11 retailers stock this exact specification. Half of all listings fall between £15,692 GBP and £28,475 GBP per carat. The same specification in lab grown form lists at a median of about £589 GBP 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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

327

Lowest Price

£29,980 GBP

Highest Price

£1,093,819 GBP

Average Price

£130,724 GBP

Market Intelligence

Retailers Selling

Price Spread

67.0%

Price Range

Price per carat distribution across retailers

$24,241/ct

10th Percentile

$15,579

Median

$24,241

90th Percentile

$38,210

Score Distribution

327 diamonds scored across 4 quality tiers

Excellent

88 (26.9%)

Very Good

76 (23.2%)

Good

96 (29.4%)

Average

67 (20.5%)

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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 8%

Lab-Grown I VS1Same specifications, lab-grown origin

Save 96%

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