How much does a 0.50 to 0.74ct F SI2 lab grown round diamond cost?

As of October 2026, 0.50 to 0.74ct F SI2 lab grown round diamonds typically cost $394 AUD to $2,164 AUD, with a median price of $1,506 AUD. There are currently 42 diamonds matching this specification available across retailers.

Where can I find the best price on a F SI2 round diamond?

About 33% of these diamonds are available at multiple retailers, with an average price spread of 142%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct F SI2 Lab Grown Round

Quick answer

As of October 2026, there are 42 lab grown round diamonds with F colour and SI2 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $394 AUD to $2,164 AUD, with a median of $1,506 AUD. At least 24 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 142%. Half of all listings fall between $828 AUD and $3,265 AUD per carat. The same specification in natural form lists at a median of about $2,159 AUD per carat. Over the last 30 days the median price moved -25.5% and the number of listings moved -28.6%.

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

Lowest Price

$208 AUD

Highest Price

$6,562 AUD

Average Price

$1,419 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

32.9%

Price Spread

141.7%

30-Day Price Trend

-25.5%

30-Day Supply Change

-28.6%

Volatility (30d)

0.10

Price Range

Price per carat distribution across retailers

$1,208/ct

10th Percentile

$332

Median

$1,208

90th Percentile

$4,307

Score Distribution

80 diamonds scored across 4 quality tiers

Excellent

4 (5.0%)

Very Good

9 (11.3%)

Good

55 (68.8%)

Average

12 (15.0%)

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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