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

As of September 2026, 1.00 to 1.49ct I VS1 natural marquise diamonds typically cost £1,807 GBP to £5,452 GBP, with a median price of £2,747 GBP. There are currently 335 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

1.00 to 1.49ct I VS1 Natural Marquise

Quick answer

As of September 2026, there are 335 natural marquise diamonds with I colour and VS1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run £1,807 GBP to £5,452 GBP, with a median of £2,747 GBP. At least 57 retailers stock this exact specification. Half of all listings fall between £2,516 GBP and £3,911 GBP per carat. The same specification in lab grown form lists at a median of about £549 GBP per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Marquise natural stones in the index: 2,114 USD per carat, -8.8% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

335

Lowest Price

£1,374 GBP

Highest Price

£14,532 GBP

Average Price

£3,237 GBP