How much does a 3.00 to 4.99ct F SI2 lab grown round diamond cost?

As of September 2026, 3.00 to 4.99ct F SI2 lab grown round diamonds typically cost $1,231 AUD to $4,439 AUD, with a median price of $1,579 AUD. There are currently 143 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct F SI2 Lab Grown Round

Quick answer

As of September 2026, there are 143 lab grown round diamonds with F colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $1,231 AUD to $4,439 AUD, with a median of $1,579 AUD. At least 23 retailers stock this exact specification. Half of all listings fall between $409 AUD and $11,587 AUD per carat. The same specification in natural form lists at a median of about $18,294 AUD per carat.

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

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Round lab grown stones in the index: 438 USD per carat, -14.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

143

Lowest Price

$473 AUD

Highest Price

$138,044 AUD

Average Price

$4,075 AUD

Market Intelligence

Retailers Selling

Price Spread

2115.9%

Price Range

Price per carat distribution across retailers

$377/ct

10th Percentile

$245

Median

$377

90th Percentile

$14,556

Score Distribution

143 diamonds scored across 4 quality tiers

Excellent

9 (6.3%)

Very Good

20 (14.0%)

Good

55 (38.5%)

Average

59 (41.3%)

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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