How much does a 3.00 to 4.99ct H I1 natural cushion diamond cost?

As of September 2026, 3.00 to 4.99ct H I1 natural cushion diamonds typically cost $42,588 AUD to $114,102 AUD, with a median price of $100,222 AUD. There are currently 4 diamonds matching this specification available across retailers.

Where can I find the best price on a H I1 cushion diamond?

About 58% of these diamonds are available at multiple retailers, with an average price spread of 58%. A comparison tool like Carat Hunter lets you see all the prices side by side.

3.00 to 4.99ct H I1 Natural Cushion

Quick answer

As of September 2026, there are 4 natural cushion diamonds with H colour and I1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $42,588 AUD to $114,102 AUD, with a median of $100,222 AUD. At least 9 retailers stock this exact specification, and 58% of the stones appear at more than one of them, with an average price spread of 58%. Half of all listings fall between $6,363 AUD and $10,739 AUD per carat. Over the last 30 days the median price moved -16.1% and the number of listings moved -82.8%.

Three of the best scored stones at this specification right now:

3.00ct Cushion H I1, GIA, score 78 of 100, from $22,099 AUD

Caratlytics Diamond Price Index, August 2026: natural diamonds at 2,184 USD per carat and lab-grown at 464 USD per carat, a natural to lab ratio of 4.7 to 1. Cushion natural stones in the index: 2,792 USD per carat, +1.1% month on month. See the full index release

Figures come from live listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: September 2026

Available

Lowest Price

$22,099 AUD

Highest Price

$173,085 AUD

Average Price

$84,596 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

58.3%

Price Spread

57.9%

30-Day Price Trend

-16.1%

30-Day Supply Change

-82.8%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$4,910/ct

10th Percentile

$2,618

Median

$4,910

90th Percentile

$7,578

Score Distribution

4 diamonds scored across 2 quality tiers

Very Good

1 (25.0%)

Average

3 (75.0%)

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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