How much does a 1.00 to 1.49ct F SI1 natural radiant diamond cost?

As of October 2026, 1.00 to 1.49ct F SI1 natural radiant diamonds typically cost $2,566 SGD to $7,202 SGD, with a median price of $4,082 SGD. There are currently 251 diamonds matching this specification available across retailers.

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

About 37% of these diamonds are available at multiple retailers, with an average price spread of 50%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct F SI1 Natural Radiant

Quick answer

As of October 2026, there are 251 natural radiant diamonds with F colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $2,566 SGD to $7,202 SGD, with a median of $4,082 SGD. At least 63 retailers stock this exact specification, and 37% of the stones appear at more than one of them, with an average price spread of 50%. Half of all listings fall between $2,983 SGD and $4,790 SGD per carat. The same specification in lab grown form lists at a median of about $560 SGD per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +19.3%.

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

251

Lowest Price

$814 SGD

Highest Price

$13,268 SGD

Average Price

$4,565 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

37.0%

Price Spread

50.2%

30-Day Price Trend

-0.5%

30-Day Supply Change

+19.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,807/ct

10th Percentile

$1,941

Median

$2,807

90th Percentile

$4,858

Score Distribution

757 diamonds scored across 4 quality tiers

Excellent

104 (13.7%)

Very Good

174 (23.0%)

Good

189 (25.0%)

Average

290 (38.3%)

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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 16%

Lab-Grown F SI1Same specifications, lab-grown origin

Save 84%

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