How much does a 0.20 to 0.49ct I VS1 lab grown round diamond cost?

As of October 2026, 0.20 to 0.49ct I VS1 lab grown round diamonds typically cost $262 NZD to $1,388 NZD, with a median price of $450 NZD. There are currently 42 diamonds matching this specification available across retailers.

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

About 10% of these diamonds are available at multiple retailers, with an average price spread of 142%. A comparison tool like Carat Hunter lets you see all the prices side by side.

0.20 to 0.49ct I VS1 Lab Grown Round

Quick answer

As of October 2026, there are 42 lab grown round diamonds with I colour and VS1 clarity in the 0.20 to 0.49ct range available across retailers worldwide. Prices typically run $262 NZD to $1,388 NZD, with a median of $450 NZD. At least 14 retailers stock this exact specification, and 10% of the stones appear at more than one of them, with an average price spread of 142%. Half of all listings fall between $898 NZD and $4,059 NZD per carat. The same specification in natural form lists at a median of about $2,715 NZD per carat. Over the last 30 days the median price moved +11.6% and the number of listings moved -63.0%.

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

$162 NZD

Highest Price

$2,075 NZD

Average Price

$642 NZD

Market Intelligence

Retailers Selling

Cross Retailer %

9.5%

Price Spread

141.6%

30-Day Price Trend

+11.6%

30-Day Supply Change

-63.0%

Volatility (30d)

0.35

Price Range

Price per carat distribution across retailers

$1,253/ct

10th Percentile

$414

Median

$1,253

90th Percentile

$3,715

Score Distribution

88 diamonds scored across 4 quality tiers

Excellent

8 (9.1%)

Very Good

36 (40.9%)

Good

31 (35.2%)

Average

13 (14.8%)

Find Your Diamond

Search 42 I VS1 round diamonds and compare prices.

Search Diamonds

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