How much does a 1.50 to 1.99ct G SI2 lab grown cushion diamond cost?

As of October 2026, 1.50 to 1.99ct G SI2 lab grown cushion diamonds typically cost $411 CAD to $1,722 CAD, with a median price of $813 CAD. There are currently 13 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI2 cushion diamond?

About 45% of these diamonds are available at multiple retailers, with an average price spread of 66%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI2 Lab Grown Cushion

Quick answer

As of October 2026, there are 13 lab grown cushion diamonds with G color and SI2 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $411 CAD to $1,722 CAD, with a median of $813 CAD. At least 21 retailers stock this exact specification, and 45% of the stones appear at more than one of them, with an average price spread of 66%. Half of all listings fall between $474 CAD and $959 CAD per carat. The same specification in natural form lists at a median of about $4,880 CAD per carat. Over the last 30 days the median price moved +6.6% and the number of listings moved +3.7%.

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

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. Cushion lab grown stones in the index: 516 USD per carat, +6.9% 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

$407 CAD

Highest Price

$2,878 CAD

Average Price

$1,062 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

45.2%

Price Spread

65.9%

30-Day Price Trend

+6.6%

30-Day Supply Change

+3.7%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$526/ct

10th Percentile

$270

Median

$526

90th Percentile

$803

Score Distribution

29 diamonds scored across 4 quality tiers

Excellent

4 (13.8%)

Very Good

6 (20.7%)

Good

6 (20.7%)

Average

13 (44.8%)

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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