How much does a 0.50 to 0.74ct I VS1 lab grown radiant diamond cost?

As of October 2026, 0.50 to 0.74ct I VS1 lab grown radiant diamonds typically cost $189 AUD to $786 AUD, with a median price of $358 AUD. There are currently 8 diamonds matching this specification available across retailers.

Where can I find the best price on a I VS1 radiant diamond?

About 39% of these diamonds are available at multiple retailers, with an average price spread of 65%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct I VS1 Lab Grown Radiant

Quick answer

As of October 2026, there are 8 lab grown radiant diamonds with I colour and VS1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $189 AUD to $786 AUD, with a median of $358 AUD. At least 30 retailers stock this exact specification, and 39% of the stones appear at more than one of them, with an average price spread of 65%. Half of all listings fall between $539 AUD and $1,094 AUD per carat. The same specification in natural form lists at a median of about $2,207 AUD per carat. Over the last 30 days the median price moved +2.7% and the number of listings moved +22.5%.

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. Radiant lab grown stones in the index: 474 USD per carat, -2.1% 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

$161 AUD

Highest Price

$2,003 AUD

Average Price

$425 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

39.4%

Price Spread

64.5%

30-Day Price Trend

+2.7%

30-Day Supply Change

+22.5%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$605/ct

10th Percentile

$237

Median

$605

90th Percentile

$1,100

Score Distribution

10 diamonds scored across 4 quality tiers

Excellent

4 (40.0%)

Very Good

2 (20.0%)

Good

1 (10.0%)

Average

3 (30.0%)

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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