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

As of November 6, 2026, 1.50 to 1.99ct M SI1 natural cushion diamonds typically cost $2,238 CAD to $6,121 CAD, with a median price of $3,947 CAD. There are currently 58 diamonds matching this specification available across retailers.

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

About 45% 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 M SI1 Natural Cushion

Quick answer

As of November 6, 2026, there are 58 natural cushion diamonds with M color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $2,238 CAD to $6,121 CAD, with a median of $3,947 CAD. Half of all listings fall between $1,884 CAD and $3,311 CAD per carat. Over the last 30 days the median price moved -0.8% and the number of listings moved +4.0%.

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

Lowest Price

$1,735 CAD

Highest Price

$9,775 CAD

Average Price

$4,207 CAD

Market Intelligence

Cross Retailer %

44.8%

Price Spread

57.1%

30-Day Price Trend

-0.8%

30-Day Supply Change

+4.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,776/ct

10th Percentile

$1,061

Median

$1,776

90th Percentile

$2,773

Score Distribution

58 diamonds scored across 4 quality tiers

Excellent

6 (10.3%)

Very Good

16 (27.6%)

Good

20 (34.5%)

Average

16 (27.6%)

Find Your Diamond

Search 58 M SI1 cushion diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

M SI2

Save 14%

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