How much does a 3.00 to 4.99ct G IF lab grown cushion diamond cost?

As of October 2026, 3.00 to 4.99ct G IF lab grown cushion diamonds typically cost $1,797 USD to $8,537 USD, with a median price of $5,728 USD. There are currently 4 diamonds matching this specification available across retailers.

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

About 29% of these diamonds are available at multiple retailers, with an average price spread of 82%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct G IF Lab Grown Cushion

Quick answer

As of October 2026, there are 4 lab grown cushion diamonds with G color and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $1,797 USD to $8,537 USD, with a median of $5,728 USD. At least 37 retailers stock this exact specification, and 29% of the stones appear at more than one of them, with an average price spread of 82%. Half of all listings fall between $677 USD and $1,542 USD per carat. The same specification in natural form lists at a median of about $16,561 USD per carat. Over the last 30 days the median price moved -7.8% and the number of listings moved +14.5%.

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. 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

$1,712 USD

Highest Price

$18,779 USD

Average Price

$6,079 USD

Market Intelligence

Retailers Selling

Cross Retailer %

28.6%

Price Spread

82.0%

30-Day Price Trend

-7.8%

30-Day Supply Change

+14.5%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$1,054/ct

10th Percentile

$502

Median

$1,054

90th Percentile

$2,281

Score Distribution

12 diamonds scored across 4 quality tiers

Excellent

3 (25.0%)

Very Good

2 (16.7%)

Good

3 (25.0%)

Average

4 (33.3%)

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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