How much does a 3.00 to 4.99ct I VS1 lab grown cushion diamond cost?

As of October 2026, 3.00 to 4.99ct I VS1 lab grown cushion diamonds typically cost HK$5,222 HKD to HK$35,605 HKD, with a median price of HK$13,346 HKD. There are currently 115 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 106%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct I VS1 Lab Grown Cushion

Quick answer

As of October 2026, there are 115 lab grown cushion diamonds with I colour and VS1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run HK$5,222 HKD to HK$35,605 HKD, with a median of HK$13,346 HKD. At least 41 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 106%. Half of all listings fall between HK$2,515 HKD and HK$7,260 HKD per carat. The same specification in natural form lists at a median of about HK$112,833 HKD per carat. Over the last 30 days the median price moved +4.5% and the number of listings moved -0.6%.

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. 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

115

Lowest Price

HK$3,225 HKD

Highest Price

HK$88,735 HKD

Average Price

HK$18,413 HKD

Market Intelligence

Retailers Selling

Cross Retailer %

30.8%

Price Spread

105.8%

30-Day Price Trend

+4.5%

30-Day Supply Change

-0.6%

Volatility (30d)

0.03

Price Range

Price per carat distribution across retailers

$572/ct

10th Percentile

$250

Median

$572

90th Percentile

$1,466

Score Distribution

201 diamonds scored across 4 quality tiers

Excellent

61 (30.3%)

Very Good

47 (23.4%)

Good

47 (23.4%)

Average

46 (22.9%)

Find Your Diamond

Search 115 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