How much does a 0.75 to 0.99ct I SI1 lab grown marquise diamond cost?

As of October 2026, 0.75 to 0.99ct I SI1 lab grown marquise diamonds typically cost ₹39,665 INR to ₹39,665 INR, with a median price of ₹39,665 INR. There are currently 1 diamonds matching this specification available across retailers.

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

About 44% 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 Lab Grown Marquise

Quick answer

As of October 2026, there are 1 lab grown marquise diamonds with I colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run ₹39,665 INR to ₹39,665 INR, with a median of ₹39,665 INR. At least 13 retailers stock this exact specification, and 44% of the stones appear at more than one of them, with an average price spread of 77%. Half of all listings fall between ₹41,668 INR and ₹83,628 INR per carat. The same specification in natural form lists at a median of about ₹2,32,972 INR per carat.

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

0.97ct Marquise I SI1, IGI, grade B, from ₹39,665 INR

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. Marquise lab grown stones in the index: 485 USD per carat, -3.2% 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

Lowest Price

₹39,665 INR

Highest Price

₹39,665 INR

Average Price

₹39,665 INR

Market Intelligence

Retailers Selling

Cross Retailer %

44.4%

Price Spread

77.3%

Price Range

Price per carat distribution across retailers

$570/ct

10th Percentile

$409

Median

$570

90th Percentile

$1,590

Score Distribution

1 diamonds scored across 1 quality tiers

Good

1 (100.0%)

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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