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

As of September 2026, 3.00 to 4.99ct I SI1 natural round diamonds typically cost ₹19,33,910 INR to ₹60,49,808 INR, with a median price of ₹34,27,331 INR. There are currently 1,304 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct I SI1 Natural Round

Quick answer

As of September 2026, there are 1,304 natural round diamonds with I colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run ₹19,33,910 INR to ₹60,49,808 INR, with a median of ₹34,27,331 INR. At least 56 retailers stock this exact specification. Half of all listings fall between ₹9,65,464 INR and ₹13,18,553 INR per carat. The same specification in lab grown form lists at a median of about ₹1,68,279 INR per carat.

Three of the best scored stones at this specification right now:

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Round natural stones in the index: 2,094 USD per carat, -3.8% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

1,304

Lowest Price

₹12,13,193 INR

Highest Price

₹1,21,14,072 INR

Average Price

₹38,11,364 INR