How much does a 1.50 to 1.99ct G SI1 lab grown princess diamond cost?

As of October 2026, 1.50 to 1.99ct G SI1 lab grown princess diamonds typically cost $322 CAD to $2,037 CAD, with a median price of $870 CAD. There are currently 56 diamonds matching this specification available across retailers.

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

About 37% of these diamonds are available at multiple retailers, with an average price spread of 102%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct G SI1 Lab Grown Princess

Quick answer

As of October 2026, there are 56 lab grown princess diamonds with G color and SI1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $322 CAD to $2,037 CAD, with a median of $870 CAD. At least 34 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 102%. Half of all listings fall between $312 CAD and $831 CAD per carat. The same specification in natural form lists at a median of about $7,077 CAD per carat. Over the last 30 days the median price moved +1.9% and the number of listings moved +11.8%.

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. Princess lab grown stones in the index: 461 USD per carat, -4.8% 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

$270 CAD

Highest Price

$5,047 CAD

Average Price

$1,119 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

36.6%

Price Spread

101.7%

30-Day Price Trend

+1.9%

30-Day Supply Change

+11.8%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$365/ct

10th Percentile

$146

Median

$365

90th Percentile

$872

Score Distribution

139 diamonds scored across 4 quality tiers

Excellent

34 (24.5%)

Very Good

13 (9.4%)

Good

41 (29.5%)

Average

51 (36.7%)

Find Your Diamond

Search 56 G SI1 princess 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