How much does a 5.00ct+ F SI1 lab grown round diamond cost?

As of October 2026, 5.00ct+ F SI1 lab grown round diamonds typically cost $1,165 NZD to $9,550 NZD, with a median price of $2,640 NZD. There are currently 199 diamonds matching this specification available across retailers.

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

About 53% of these diamonds are available at multiple retailers, with an average price spread of 80%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ F SI1 Lab Grown Round

Quick answer

As of October 2026, there are 199 lab grown round diamonds with F colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $1,165 NZD to $9,550 NZD, with a median of $2,640 NZD. At least 27 retailers stock this exact specification, and 53% of the stones appear at more than one of them, with an average price spread of 80%. Half of all listings fall between $441 NZD and $927 NZD per carat. The same specification in natural form lists at a median of about $51,282 NZD per carat. Over the last 30 days the median price moved -16.1% and the number of listings moved +35.5%.

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

199

Lowest Price

$987 NZD

Highest Price

$61,178 NZD

Average Price

$4,194 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

52.5%

Price Spread

79.6%

30-Day Price Trend

-16.1%

30-Day Supply Change

+35.5%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$344/ct

10th Percentile

$199

Median

$344

90th Percentile

$756

Score Distribution

358 diamonds scored across 4 quality tiers

Excellent

155 (43.3%)

Very Good

77 (21.5%)

Good

66 (18.4%)

Average

60 (16.8%)

Find Your Diamond

Search 199 F SI1 round diamonds and compare prices.

Search Diamonds

Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

F SI2SI2 inclusions are not visible without magnification

Save 18%

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