How much does a 0.20 to 0.49ct D SI1 lab grown round diamond cost?

As of October 2026, 0.20 to 0.49ct D SI1 lab grown round diamonds typically cost $121 CAD to $752 CAD, with a median price of $307 CAD. There are currently 984 diamonds matching this specification available across retailers.

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

About 59% of these diamonds are available at multiple retailers, with an average price spread of 121%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct D SI1 Lab Grown Round

Quick answer

As of October 2026, there are 984 lab grown round diamonds with D color and SI1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $121 CAD to $752 CAD, with a median of $307 CAD. At least 19 retailers stock this exact specification, and 59% of the stones appear at more than one of them, with an average price spread of 121%. Half of all listings fall between $416 CAD and $1,218 CAD per carat. The same specification in natural form lists at a median of about $2,298 CAD per carat. Over the last 30 days the median price moved -13.7% and the number of listings moved -22.1%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

984

Lowest Price

$67 CAD

Highest Price

$2,207 CAD

Average Price

$385 CAD

Market Intelligence

Retailers Selling

Cross Retailer %

58.7%

Price Spread

120.7%

30-Day Price Trend

-13.7%

30-Day Supply Change

-22.1%

Volatility (30d)

0.07

Price Range

Price per carat distribution across retailers

$473/ct

10th Percentile

$233

Median

$473

90th Percentile

$1,218

Score Distribution

1.7K diamonds scored across 4 quality tiers

Excellent

415 (24.8%)

Very Good

548 (32.7%)

Good

320 (19.1%)

Average

391 (23.4%)

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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