How much does a 0.75 to 0.99ct I SI1 natural cushion diamond cost?

As of October 2026, 0.75 to 0.99ct I SI1 natural cushion diamonds typically cost ₹66,178 INR to ₹2,46,916 INR, with a median price of ₹1,22,453 INR. There are currently 190 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 77%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct I SI1 Natural Cushion

Quick answer

As of October 2026, there are 190 natural cushion diamonds with I colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run ₹66,178 INR to ₹2,46,916 INR, with a median of ₹1,22,453 INR. At least 58 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 77%. Half of all listings fall between ₹1,21,718 INR and ₹2,65,703 INR per carat. The same specification in lab grown form lists at a median of about ₹78,071 INR per carat. Over the last 30 days the median price moved +1.5% and the number of listings moved +2.7%.

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. Cushion natural stones in the index: 2,948 USD per carat, +1.7% 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

190

Lowest Price

₹49,287 INR

Highest Price

₹5,08,266 INR

Average Price

₹1,44,736 INR