How much does a 5.00ct+ I SI1 natural marquise diamond cost?

As of November 2026, 5.00ct+ I SI1 natural marquise diamonds typically cost ₹65,33,907 INR to ₹83,74,038 INR, with a median price of ₹71,28,047 INR. There are currently 2 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

5.00ct+ I SI1 Natural Marquise

Quick answer

As of November 2026, there are 2 natural marquise diamonds with I colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run ₹65,33,907 INR to ₹83,74,038 INR, with a median of ₹71,28,047 INR. The same specification in lab grown form lists at a median of about ₹41,115 INR per carat.

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

₹64,29,283 INR

Highest Price

₹1,33,10,155 INR

Average Price

₹73,45,331 INR

Score Distribution

6 diamonds scored across 4 quality tiers

Excellent

1 (16.7%)

Very Good

1 (16.7%)

Good

3 (50.0%)

Average

1 (16.7%)

Find Your Diamond

Search 2 I SI1 marquise diamonds and compare prices.

Search Diamonds

Related Specifications

D IF D VVS1 D VVS2 D VS1 D VS2 D SI1 E IF E VVS1 E VVS2 E VS1 E VS2 E SI1 F IF F VVS1 F VVS2 F VS1 F VS2 F SI1 G IF G VVS1 G VVS2 G VS1 G VS2 G SI1 H IF H VVS1 H VVS2 H VS1 H VS2 H SI1 I IF I VVS1 I VVS2 I VS1 I VS2 I SI1