How much does a 1.50 to 1.99ct K SI1 natural cushion diamond cost?

As of November 6, 2026, 1.50 to 1.99ct K SI1 natural cushion diamonds typically cost ₹1,81,452 INR to ₹5,00,926 INR, with a median price of ₹2,74,472 INR. There are currently 397 diamonds matching this specification available across retailers.

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

About 39% of these diamonds are available at multiple retailers, with an average price spread of 57%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct K SI1 Natural Cushion

Quick answer

As of November 6, 2026, there are 397 natural cushion diamonds with K colour and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run ₹1,81,452 INR to ₹5,00,926 INR, with a median of ₹2,74,472 INR. Half of all listings fall between ₹1,38,250 INR and ₹2,39,649 INR per carat. The same specification in lab grown form lists at a median of about ₹1,40,545 INR per carat. Over the last 30 days the median price moved -0.6% and the number of listings moved +5.8%.

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. Cushion natural stones in the index: 2,881 USD per carat, -2.5% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 6, 2026

Available

397

Lowest Price

₹1,46,985 INR

Highest Price

₹9,47,667 INR

Average Price

₹3,13,977 INR

Market Intelligence

Cross Retailer %

38.5%

Price Spread

57.2%

30-Day Price Trend

-0.6%

30-Day Supply Change

+5.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,888/ct

10th Percentile

$1,274

Median

$1,888

90th Percentile

$3,278

Score Distribution

397 diamonds scored across 4 quality tiers

Excellent

93 (23.4%)

Very Good

111 (28.0%)

Good

95 (23.9%)

Average

98 (24.7%)

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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