How much does a 1.00 to 1.49ct I VS1 natural marquise diamond cost?

As of October 2026, 1.00 to 1.49ct I VS1 natural marquise diamonds typically cost $2,384 USD to $9,738 USD, with a median price of $4,147 USD. There are currently 105 diamonds matching this specification available across retailers.

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

About 41% of these diamonds are available at multiple retailers, with an average price spread of 46%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I VS1 Natural Marquise

Quick answer

As of October 2026, there are 105 natural marquise diamonds with I color and VS1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,384 USD to $9,738 USD, with a median of $4,147 USD. At least 61 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 46%. Half of all listings fall between $3,411 USD and $5,407 USD per carat. The same specification in lab grown form lists at a median of about $708 USD per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +9.3%.

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

105

Lowest Price

$1,695 USD

Highest Price

$19,392 USD

Average Price

$5,336 USD