How much does a 1.50 to 1.99ct I IF natural oval diamond cost?

As of October 2026, 1.50 to 1.99ct I IF natural oval diamonds typically cost $7,150 AUD to $21,094 AUD, with a median price of $11,077 AUD. There are currently 34 diamonds matching this specification available across retailers.

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

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

1.50 to 1.99ct I IF Natural Oval

Quick answer

As of October 2026, there are 34 natural oval diamonds with I colour and IF clarity in the 1.50 to 1.99ct range available across retailers worldwide. Prices typically run $7,150 AUD to $21,094 AUD, with a median of $11,077 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 42%. Half of all listings fall between $7,338 AUD and $11,196 AUD per carat. The same specification in lab grown form lists at a median of about $1,710 AUD per carat. Over the last 30 days the median price moved -2.4% and the number of listings moved +14.2%.

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. Oval natural stones in the index: 2,655 USD per carat, +10.2% 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: October 2026

Available

Lowest Price

$5,253 AUD

Highest Price

$33,918 AUD

Average Price

$12,147 AUD

Market Intelligence

Retailers Selling

Cross Retailer %

41.9%

Price Spread

42.4%

30-Day Price Trend

-2.4%

30-Day Supply Change

+14.2%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$6,387/ct

10th Percentile

$4,153

Median

$6,387

90th Percentile

$9,577

Score Distribution

102 diamonds scored across 4 quality tiers

Excellent

44 (43.1%)

Very Good

19 (18.6%)

Good

20 (19.6%)

Average

19 (18.6%)

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Consider Instead

Save money without compromising on what matters. These alternatives are visually similar but cost less.

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

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Lab-Grown I IFSame specifications, lab-grown origin

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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