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

As of October 2026, 3.00 to 4.99ct I SI1 natural round diamonds typically cost ₹26,14,350 INR to ₹66,93,850 INR, with a median price of ₹40,21,585 INR. There are currently 510 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 29%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I SI1 Natural Round

Quick answer

As of October 2026, there are 510 natural round diamonds with I colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run ₹26,14,350 INR to ₹66,93,850 INR, with a median of ₹40,21,585 INR. At least 62 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 29%. Half of all listings fall between ₹9,74,929 INR and ₹13,07,304 INR per carat. The same specification in lab grown form lists at a median of about ₹49,532 INR per carat. Over the last 30 days the median price moved -0.9% and the number of listings moved +5.3%.

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. Round natural stones in the index: 2,248 USD per carat, +7.6% 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

510

Lowest Price

₹12,12,655 INR

Highest Price

₹1,21,04,009 INR

Average Price

₹43,34,241 INR