How much does a 1.00 to 1.49ct M SI2 natural round diamond cost?

As of November 6, 2026, 1.00 to 1.49ct M SI2 natural round diamonds typically cost $1,269 SGD to $3,342 SGD, with a median price of $2,151 SGD. There are currently 438 diamonds matching this specification available across retailers.

Where can I find the best price on a M SI2 round diamond?

About 53% of these diamonds are available at multiple retailers, with an average price spread of 52%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct M SI2 Natural Round

Quick answer

As of November 6, 2026, there are 438 natural round diamonds with M colour and SI2 clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $1,269 SGD to $3,342 SGD, with a median of $2,151 SGD. Half of all listings fall between $1,447 SGD and $2,469 SGD per carat. The same specification in lab grown form lists at a median of about $185 SGD per carat. Over the last 30 days the median price moved +1.2% and the number of listings moved +11.5%.

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. Round natural stones in the index: 2,124 USD per carat, -6.9% 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 6, 2026

Available

438

Lowest Price

$830 SGD

Highest Price

$6,583 SGD

Average Price

$2,237 SGD

Market Intelligence

Cross Retailer %

52.5%

Price Spread

52.4%

30-Day Price Trend

+1.2%

30-Day Supply Change

+11.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,527/ct

10th Percentile

$956

Median

$1,527

90th Percentile

$2,228

Score Distribution

438 diamonds scored across 4 quality tiers

Excellent

45 (10.3%)

Very Good

127 (29.0%)

Good

114 (26.0%)

Average

152 (34.7%)

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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