How much does a 1.50 to 1.99ct J I1 natural cushion diamond cost?

As of November 2026, 1.50 to 1.99ct J I1 natural cushion diamonds typically cost $4,309 AUD to $7,936 AUD, with a median price of $6,472 AUD. There are currently 10 diamonds matching this specification available across retailers.

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

About 6% of these diamonds are available at multiple retailers, with an average price spread of 27%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.50 to 1.99ct J I1 Natural Cushion

Quick answer

As of November 2026, there are 10 natural cushion diamonds with J colour and I1 clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $4,309 AUD to $7,936 AUD, with a median of $6,472 AUD. At least 21 retailers stock this exact specification, and 6% of the stones appear at more than one of them, with an average price spread of 27%. Half of all listings fall between $2,971 AUD and $3,919 AUD per carat. Over the last 30 days the median price moved -0.5% and the number of listings moved -3.3%.

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 natural stones in the index: 2,948 USD per carat, +1.7% 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: November 2026

Available

Lowest Price

$3,225 AUD

Highest Price

$10,154 AUD

Average Price

$6,308 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

6.5%

Price Spread

26.7%

30-Day Price Trend

-0.5%

30-Day Supply Change

-3.3%

Volatility (30d)

0.00

Price Range

Price per carat distribution across retailers

$2,490/ct

10th Percentile

$1,613

Median

$2,490

90th Percentile

$3,054

Score Distribution

139 diamonds scored across 4 quality tiers

Excellent

1 (0.7%)

Very Good

5 (3.6%)

Good

3 (2.2%)

Average

130 (93.5%)

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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