How much does a 3.00 to 4.99ct I VS1 natural marquise diamond cost?

As of October 2026, 3.00 to 4.99ct I VS1 natural marquise diamonds typically cost $25,873 USD to $108,190 USD, with a median price of $35,754 USD. There are currently 6 diamonds matching this specification available across retailers.

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

About 30% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I VS1 Natural Marquise

Quick answer

As of October 2026, there are 6 natural marquise diamonds with I color and VS1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $25,873 USD to $108,190 USD, with a median of $35,754 USD. At least 38 retailers stock this exact specification, and 30% of the stones appear at more than one of them, with an average price spread of 54%. Half of all listings fall between $11,151 USD and $18,770 USD per carat. The same specification in lab grown form lists at a median of about $567 USD per carat. Over the last 30 days the median price moved -4.9% and the number of listings moved +3.7%.

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. Marquise natural stones in the index: 2,268 USD per carat, +10.8% 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

$24,077 USD

Highest Price

$113,534 USD

Average Price

$50,015 USD

Market Intelligence

Retailers Selling

Cross Retailer %

29.6%

Price Spread

53.5%

30-Day Price Trend

-4.9%

30-Day Supply Change

+3.7%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$14,241/ct

10th Percentile

$9,717

Median

$14,241

90th Percentile

$23,632

Score Distribution

20 diamonds scored across 4 quality tiers

Excellent

6 (30.0%)

Very Good

5 (25.0%)

Good

4 (20.0%)

Average

5 (25.0%)

Find Your Diamond

Search 6 I VS1 marquise diamonds and compare prices.

Search Diamonds

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 18%

Lab-Grown I VS1Same specifications, lab-grown origin

Save 95%

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