How much does a 1.00 to 1.49ct I IF natural marquise diamond cost?

As of November 2026, 1.00 to 1.49ct I IF natural marquise diamonds typically cost $4,231 AUD to $8,555 AUD, with a median price of $5,283 AUD. There are currently 46 diamonds matching this specification available across retailers.

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

About 42% of these diamonds are available at multiple retailers, with an average price spread of 39%. A comparison tool like Carat Hunter lets you see all the prices side by side.

1.00 to 1.49ct I IF Natural Marquise

Quick answer

As of November 2026, there are 46 natural marquise diamonds with I colour and IF clarity in the 1.00 to 1.49ct range available across retailers worldwide. Prices typically run $4,231 AUD to $8,555 AUD, with a median of $5,283 AUD. At least 55 retailers stock this exact specification, and 42% of the stones appear at more than one of them, with an average price spread of 39%. Half of all listings fall between $5,440 AUD and $8,043 AUD per carat. Over the last 30 days the median price moved +2.3% and the number of listings moved +13.0%.

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

Caratlytics Diamond Price Index, October 2026: natural diamonds at 2,202 USD per carat and lab-grown at 462 USD per carat, a natural to lab ratio of 4.8 to 1. Marquise natural stones in the index: 2,177 USD per carat, -4.2% 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

$3,478 AUD

Highest Price

$16,511 AUD

Average Price

$5,953 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

41.8%

Price Spread

39.2%

30-Day Price Trend

+2.3%

30-Day Supply Change

+13.0%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$4,667/ct

10th Percentile

$3,237

Median

$4,667

90th Percentile

$6,827

Score Distribution

103 diamonds scored across 4 quality tiers

Excellent

46 (44.7%)

Very Good

23 (22.3%)

Good

21 (20.4%)

Average

13 (12.6%)

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Consider Instead

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J IFJ colour is visually identical to I to the naked eye

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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