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

As of October 2026, 3.00 to 4.99ct D IF lab grown cushion diamonds typically cost $2,385 AUD to $13,605 AUD, with a median price of $5,285 AUD. There are currently 1,421 diamonds matching this specification available across retailers.

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

About 31% of these diamonds are available at multiple retailers, with an average price spread of 81%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct D IF Lab Grown Cushion

Quick answer

As of October 2026, there are 1,421 lab grown cushion diamonds with D colour and IF clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $2,385 AUD to $13,605 AUD, with a median of $5,285 AUD. At least 52 retailers stock this exact specification, and 31% of the stones appear at more than one of them, with an average price spread of 81%. Half of all listings fall between $1,119 AUD and $2,628 AUD per carat. The same specification in natural form lists at a median of about $39,153 AUD per carat. Over the last 30 days the median price moved -18.3% and the number of listings moved +18.6%.

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

1,421

Lowest Price

$1,762 AUD

Highest Price

$67,835 AUD

Average Price

$7,147 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

31.0%

Price Spread

81.4%

30-Day Price Trend

-18.3%

30-Day Supply Change

+18.6%

Volatility (30d)

0.04

Price Range

Price per carat distribution across retailers

$1,302/ct

10th Percentile

$594

Median

$1,302

90th Percentile

$3,020

Score Distribution

4.6K diamonds scored across 5 quality tiers

Exceptional

100 (2.2%)

Excellent

1,352 (29.6%)

Very Good

2,453 (53.7%)

Good

486 (10.6%)

Average

180 (3.9%)

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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