How much does a 1.50 to 1.99ct M I1 natural round diamond cost?

As of November 6, 2026, 1.50 to 1.99ct M I1 natural round diamonds typically cost $1,949 SGD to $6,136 SGD, with a median price of $3,191 SGD. There are currently 69 diamonds matching this specification available across retailers.

Where can I find the best price on a M I1 round diamond?

About 54% of these diamonds are available at multiple retailers, with an average price spread of 54%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct M I1 Natural Round

Quick answer

As of November 6, 2026, there are 69 natural round diamonds with M colour and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $1,949 SGD to $6,136 SGD, with a median of $3,191 SGD. Half of all listings fall between $1,553 SGD and $2,668 SGD per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved +15.8%.

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. 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

Lowest Price

$1,128 SGD

Highest Price

$14,032 SGD

Average Price

$3,587 SGD

Market Intelligence

Cross Retailer %

53.6%

Price Spread

53.5%

30-Day Price Trend

-0.5%

30-Day Supply Change

+15.8%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$1,630/ct

10th Percentile

$1,017

Median

$1,630

90th Percentile

$2,834

Score Distribution

69 diamonds scored across 4 quality tiers

Excellent

6 (8.7%)

Very Good

30 (43.5%)

Good

18 (26.1%)

Average

15 (21.7%)

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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