How much does a 0.75 to 0.99ct F SI1 natural round diamond cost?

As of October 2026, 0.75 to 0.99ct F SI1 natural round diamonds typically cost $2,351 NZD to $7,430 NZD, with a median price of $4,011 NZD. There are currently 1,774 diamonds matching this specification available across retailers.

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

About 34% of these diamonds are available at multiple retailers, with an average price spread of 53%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.75 to 0.99ct F SI1 Natural Round

Quick answer

As of October 2026, there are 1,774 natural round diamonds with F colour and SI1 clarity in the 0.75 to 0.99ct range available across retailers worldwide. Prices typically run $2,351 NZD to $7,430 NZD, with a median of $4,011 NZD. At least 67 retailers stock this exact specification, and 34% of the stones appear at more than one of them, with an average price spread of 53%. Half of all listings fall between $3,468 NZD and $5,745 NZD per carat. The same specification in lab grown form lists at a median of about $918 NZD per carat. Over the last 30 days the median price moved -1.5% and the number of listings moved +8.7%.

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 natural stones in the index: 2,248 USD per carat, +7.6% 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

1,774

Lowest Price

$1,412 NZD

Highest Price

$12,313 NZD

Average Price

$4,511 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

33.7%

Price Spread

53.1%

30-Day Price Trend

-1.5%

30-Day Supply Change

+8.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$2,408/ct

10th Percentile

$1,665

Median

$2,408

90th Percentile

$4,438

Score Distribution

3.2K diamonds scored across 4 quality tiers

Excellent

553 (17.3%)

Very Good

684 (21.4%)

Good

862 (26.9%)

Average

1,103 (34.4%)

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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%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 79%

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