How much does a 3.00 to 4.99ct I VS1 lab grown round diamond cost?

As of October 2026, 3.00 to 4.99ct I VS1 lab grown round diamonds typically cost $446 USD to $2,183 USD, with a median price of $773 USD. There are currently 132 diamonds matching this specification available across retailers.

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

About 26% of these diamonds are available at multiple retailers, with an average price spread of 81%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I VS1 Lab Grown Round

Quick answer

As of October 2026, there are 132 lab grown round diamonds with I color and VS1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $446 USD to $2,183 USD, with a median of $773 USD. At least 42 retailers stock this exact specification, and 26% of the stones appear at more than one of them, with an average price spread of 81%. Half of all listings fall between $257 USD and $576 USD per carat. The same specification in natural form lists at a median of about $16,492 USD per carat. Over the last 30 days the median price moved +3.9% and the number of listings moved -12.8%.

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 lab grown stones in the index: 414 USD per carat, -5.0% 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

132

Lowest Price

$353 USD

Highest Price

$5,950 USD

Average Price

$1,098 USD

Market Intelligence

Retailers Selling

Cross Retailer %

25.8%

Price Spread

80.6%

30-Day Price Trend

+3.9%

30-Day Supply Change

-12.8%

Volatility (30d)

0.05

Price Range

Price per carat distribution across retailers

$397/ct

10th Percentile

$161

Median

$397

90th Percentile

$680

Score Distribution

194 diamonds scored across 4 quality tiers

Excellent

100 (51.5%)

Very Good

53 (27.3%)

Good

16 (8.2%)

Average

25 (12.9%)

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

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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