How much does a 5.00ct+ I VS1 lab grown cushion diamond cost?

As of October 2026, 5.00ct+ I VS1 lab grown cushion diamonds typically cost $1,614 AUD to $9,928 AUD, with a median price of $3,994 AUD. There are currently 26 diamonds matching this specification available across retailers.

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

About 36% of these diamonds are available at multiple retailers, with an average price spread of 90%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ I VS1 Lab Grown Cushion

Quick answer

As of October 2026, there are 26 lab grown cushion diamonds with I colour and VS1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $1,614 AUD to $9,928 AUD, with a median of $3,994 AUD. At least 26 retailers stock this exact specification, and 36% of the stones appear at more than one of them, with an average price spread of 90%. Half of all listings fall between $501 AUD and $1,223 AUD per carat. The same specification in natural form lists at a median of about $27,500 AUD per carat. Over the last 30 days the median price moved +0.6% and the number of listings moved +26.7%.

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. Cushion lab grown stones in the index: 516 USD per carat, +6.9% 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

$867 AUD

Highest Price

$209,944 AUD

Average Price

$6,701 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

35.7%

Price Spread

89.8%

30-Day Price Trend

+0.6%

30-Day Supply Change

+26.7%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$565/ct

10th Percentile

$245

Median

$565

90th Percentile

$1,330

Score Distribution

38 diamonds scored across 4 quality tiers

Excellent

9 (23.7%)

Very Good

13 (34.2%)

Good

10 (26.3%)

Average

6 (15.8%)

Find Your Diamond

Search 26 I VS1 cushion 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