How much does a 3.00 to 4.99ct I SI1 natural radiant diamond cost?

As of October 2026, 3.00 to 4.99ct I SI1 natural radiant diamonds typically cost ₹27,37,718 INR to ₹60,05,525 INR, with a median price of ₹39,49,011 INR. There are currently 107 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 24%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I SI1 Natural Radiant

Quick answer

As of October 2026, there are 107 natural radiant diamonds with I colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run ₹27,37,718 INR to ₹60,05,525 INR, with a median of ₹39,49,011 INR. At least 48 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 24%. Half of all listings fall between ₹9,60,927 INR and ₹12,17,379 INR per carat. The same specification in lab grown form lists at a median of about ₹44,315 INR per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +9.3%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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: October 2026

Available

107

Lowest Price

₹12,11,555 INR

Highest Price

₹1,26,12,367 INR

Average Price

₹42,55,418 INR