How much does a 1.50 to 1.99ct G IF natural marquise diamond cost?

As of November 2026, 1.50 to 1.99ct G IF natural marquise diamonds typically cost £12,756 GBP to £18,843 GBP, with a median price of £14,098 GBP. There are currently 4 diamonds matching this specification available across retailers.

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

About 38% of these diamonds are available at multiple retailers, with an average price spread of 20%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G IF Natural Marquise

Quick answer

As of November 2026, there are 4 natural marquise diamonds with G colour and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run £12,756 GBP to £18,843 GBP, with a median of £14,098 GBP. At least 39 retailers stock this exact specification, and 38% of the stones appear at more than one of them, with an average price spread of 20%. Half of all listings fall between £8,700 GBP and £10,671 GBP per carat. The same specification in lab grown form lists at a median of about £794 GBP per carat. Over the last 30 days the median price moved +1.2% and the number of listings moved +35.7%.

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: November 2026

Available

Lowest Price

£11,836 GBP

Highest Price

£23,815 GBP

Average Price

£15,306 GBP