How much does a 0.50 to 0.74ct F SI1 natural radiant diamond cost?

As of October 2026, 0.50 to 0.74ct F SI1 natural radiant diamonds typically cost $695 SGD to $2,193 SGD, with a median price of $1,230 SGD. There are currently 128 diamonds matching this specification available across retailers.

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

About 27% of these diamonds are available at multiple retailers, with an average price spread of 55%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct F SI1 Natural Radiant

Quick answer

As of October 2026, there are 128 natural radiant diamonds with F colour and SI1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $695 SGD to $2,193 SGD, with a median of $1,230 SGD. At least 56 retailers stock this exact specification, and 27% of the stones appear at more than one of them, with an average price spread of 55%. Half of all listings fall between $1,636 SGD and $2,749 SGD per carat. The same specification in lab grown form lists at a median of about $751 SGD per carat. Over the last 30 days the median price moved -0.1% and the number of listings moved +8.8%.

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. Radiant natural stones in the index: 3,091 USD per carat, +13.2% 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

128

Lowest Price

$447 SGD

Highest Price

$4,233 SGD

Average Price

$1,357 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

27.3%

Price Spread

54.7%

30-Day Price Trend

-0.1%

30-Day Supply Change

+8.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$1,589/ct

10th Percentile

$1,030

Median

$1,589

90th Percentile

$3,096

Score Distribution

469 diamonds scored across 4 quality tiers

Excellent

61 (13.0%)

Very Good

105 (22.4%)

Good

131 (27.9%)

Average

172 (36.7%)

Find Your Diamond

Search 128 F SI1 radiant 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 5%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 63%

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