How much does a 0.50 to 0.74ct M I1 natural round diamond cost?

As of November 6, 2026, 0.50 to 0.74ct M I1 natural round diamonds typically cost $321 AUD to $1,345 AUD, with a median price of $659 AUD. There are currently 57 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 81%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct M I1 Natural Round

Quick answer

As of November 6, 2026, there are 57 natural round diamonds with M colour and I1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $321 AUD to $1,345 AUD, with a median of $659 AUD. Half of all listings fall between $780 AUD and $1,702 AUD per carat. The same specification in lab grown form lists at a median of about $550 AUD per carat. Over the last 30 days the median price moved -0.9% and the number of listings moved -14.7%.

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

$167 AUD

Highest Price

$3,196 AUD

Average Price

$757 AUD

Market Intelligence

Cross Retailer %

54.4%

Price Spread

80.9%

30-Day Price Trend

-0.9%

30-Day Supply Change

-14.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$798/ct

10th Percentile

$429

Median

$798

90th Percentile

$1,508

Score Distribution

57 diamonds scored across 4 quality tiers

Excellent

2 (3.5%)

Very Good

18 (31.6%)

Good

15 (26.3%)

Average

22 (38.6%)

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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