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

As of November 7, 2026, 1.00 to 1.49ct L SI1 natural radiant diamonds typically cost $1,264 SGD to $3,459 SGD, with a median price of $1,713 SGD. There are currently 68 diamonds matching this specification available across retailers.

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

About 60% of these diamonds are available at multiple retailers, with an average price spread of 62%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct L SI1 Natural Radiant

Quick answer

As of November 7, 2026, there are 68 natural radiant diamonds with L colour and SI1 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,264 SGD to $3,459 SGD, with a median of $1,713 SGD. Half of all listings fall between $1,346 SGD and $2,355 SGD per carat. The same specification in lab grown form lists at a median of about $292 SGD per carat. Over the last 30 days the median price moved +5.5% and the number of listings moved +31.8%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Radiant natural stones in the index: 3,108 USD per carat, +0.3% month on month. See the full index release

Figures come from current listings across more than 125 retailers. The index is a monthly release.

Last updated: November 7, 2026

Available

Lowest Price

$947 SGD

Highest Price

$6,973 SGD

Average Price

$2,139 SGD

Market Intelligence

Cross Retailer %

60.3%

Price Spread

62.2%

30-Day Price Trend

+5.5%

30-Day Supply Change

+31.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,264/ct

10th Percentile

$979

Median

$1,264

90th Percentile

$2,254

Score Distribution

68 diamonds scored across 4 quality tiers

Excellent

11 (16.2%)

Very Good

21 (30.9%)

Good

11 (16.2%)

Average

25 (36.8%)

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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