How much does a 0.50 to 0.74ct I I1 lab grown round diamond cost?

As of October 2026, 0.50 to 0.74ct I I1 lab grown round diamonds typically cost $300 AUD to $1,276 AUD, with a median price of $465 AUD. There are currently 17 diamonds matching this specification available across retailers.

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

About 24% of these diamonds are available at multiple retailers, with an average price spread of 146%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct I I1 Lab Grown Round

Quick answer

As of October 2026, there are 17 lab grown round diamonds with I colour and I1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $300 AUD to $1,276 AUD, with a median of $465 AUD. At least 18 retailers stock this exact specification, and 24% of the stones appear at more than one of them, with an average price spread of 146%. Half of all listings fall between $496 AUD and $1,749 AUD per carat. The same specification in natural form lists at a median of about $1,744 AUD per carat. Over the last 30 days the median price moved -59.0% and the number of listings moved -75.5%.

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. Round lab grown stones in the index: 414 USD per carat, -5.0% 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

Lowest Price

$196 AUD

Highest Price

$2,151 AUD

Average Price

$740 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

24.3%

Price Spread

145.7%

30-Day Price Trend

-59.0%

30-Day Supply Change

-75.5%

Volatility (30d)

0.38

Price Range

Price per carat distribution across retailers

$604/ct

10th Percentile

$284

Median

$604

90th Percentile

$1,514

Score Distribution

19 diamonds scored across 3 quality tiers

Very Good

6 (31.6%)

Good

7 (36.8%)

Average

6 (31.6%)

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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