How much does a 1.50 to 1.99ct I SI1 natural marquise diamond cost?

As of November 2026, 1.50 to 1.99ct I SI1 natural marquise diamonds typically cost ₹5,30,853 INR to ₹16,86,122 INR, with a median price of ₹8,36,331 INR. There are currently 77 diamonds matching this specification available across retailers.

Where can I find the best price on a I SI1 marquise diamond?

About 32% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct I SI1 Natural Marquise

Quick answer

As of November 2026, there are 77 natural marquise diamonds with I colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run ₹5,30,853 INR to ₹16,86,122 INR, with a median of ₹8,36,331 INR. At least 58 retailers stock this exact specification, and 32% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between ₹5,03,188 INR and ₹7,50,684 INR per carat. The same specification in lab grown form lists at a median of about ₹95,008 INR per carat. Over the last 30 days the median price moved -4.3% and the number of listings moved +18.3%.

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

Lowest Price

₹3,42,433 INR

Highest Price

₹26,76,451 INR

Average Price

₹9,87,688 INR