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

As of October 2026, 5.00ct+ I VS1 natural radiant diamonds typically cost $74,559 SGD to $169,282 SGD, with a median price of $106,100 SGD. There are currently 22 diamonds matching this specification available across retailers.

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

About 40% of these diamonds are available at multiple retailers, with an average price spread of 41%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ I VS1 Natural Radiant

Quick answer

As of October 2026, there are 22 natural radiant diamonds with I colour and VS1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $74,559 SGD to $169,282 SGD, with a median of $106,100 SGD. At least 45 retailers stock this exact specification, and 40% of the stones appear at more than one of them, with an average price spread of 41%. Half of all listings fall between $19,312 SGD and $29,036 SGD per carat. The same specification in lab grown form lists at a median of about $578 SGD per carat. Over the last 30 days the median price moved -1.9% and the number of listings moved +26.6%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

$54,057 SGD

Highest Price

$425,804 SGD

Average Price

$119,270 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

40.0%

Price Spread

40.7%

30-Day Price Trend

-1.9%

30-Day Supply Change

+26.6%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$18,674/ct

10th Percentile

$13,072

Median

$18,674

90th Percentile

$26,998

Score Distribution

48 diamonds scored across 4 quality tiers

Excellent

15 (31.3%)

Very Good

10 (20.8%)

Good

8 (16.7%)

Average

15 (31.3%)

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Consider Instead

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

Lab-Grown I VS1Same 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