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

As of October 2026, 0.50 to 0.74ct I VS1 lab grown round diamonds typically cost $560 NZD to $1,622 NZD, with a median price of $720 NZD. There are currently 71 diamonds matching this specification available across retailers.

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

About 33% of these diamonds are available at multiple retailers, with an average price spread of 107%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.50 to 0.74ct I VS1 Lab Grown Round

Quick answer

As of October 2026, there are 71 lab grown round diamonds with I colour and VS1 clarity in the 0.50 to 0.74ct range available across retailers worldwide. Prices typically run $560 NZD to $1,622 NZD, with a median of $720 NZD. At least 31 retailers stock this exact specification, and 33% of the stones appear at more than one of them, with an average price spread of 107%. Half of all listings fall between $1,247 NZD and $3,224 NZD per carat. The same specification in natural form lists at a median of about $3,074 NZD per carat. Over the last 30 days the median price moved -26.1% and the number of listings moved -34.6%.

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

$159 NZD

Highest Price

$5,011 NZD

Average Price

$1,033 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

33.2%

Price Spread

107.3%

30-Day Price Trend

-26.1%

30-Day Supply Change

-34.6%

Volatility (30d)

0.09

Price Range

Price per carat distribution across retailers

$1,034/ct

10th Percentile

$618

Median

$1,034

90th Percentile

$3,012

Score Distribution

101 diamonds scored across 4 quality tiers

Excellent

34 (33.7%)

Very Good

25 (24.8%)

Good

30 (29.7%)

Average

12 (11.9%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

J VS1J colour is visually identical to I to the naked eye

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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