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

As of November 2026, 1.00 to 1.49ct I VS1 natural marquise diamonds typically cost £1,770 GBP to £7,266 GBP, with a median price of £2,989 GBP. There are currently 107 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 November 2026, there are 107 natural marquise diamonds with I colour and VS1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,770 GBP to £7,266 GBP, with a median of £2,989 GBP. 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 £2,556 GBP and £4,063 GBP per carat. The same specification in lab grown form lists at a median of about £538 GBP per carat. Over the last 30 days the median price moved -0.2% and the number of listings moved +7.7%.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise natural stones in the index: 2,177 USD per carat, -4.2% 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: November 2026

Available

107

Lowest Price

£1,263 GBP

Highest Price

£14,451 GBP

Average Price

£3,928 GBP