How much does a 5.00ct+ H SI2 natural oval diamond cost?

As of September 2026, 5.00ct+ H SI2 natural oval diamonds typically cost $56,657 AUD to $187,913 AUD, with a median price of $103,655 AUD. There are currently 110 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI2 oval diamond?

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5.00ct+ H SI2 Natural Oval

Quick answer

As of September 2026, there are 110 natural oval diamonds with H colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $56,657 AUD to $187,913 AUD, with a median of $103,655 AUD. At least 9 retailers stock this exact specification. Half of all listings fall between $32,273 AUD and $42,412 AUD per carat. The same specification in lab grown form lists at a median of about $21,576 AUD per carat.

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

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. Oval natural stones in the index: 2,380 USD per carat, -9.6% 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

110

Lowest Price

$36,882 AUD

Highest Price

$368,241 AUD

Average Price

$115,720 AUD

Market Intelligence

Retailers Selling

Price Spread

26.7%

Price Range

Price per carat distribution across retailers

$27,066/ct

10th Percentile

$15,140

Median

$27,066

90th Percentile

$31,690

Score Distribution

110 diamonds scored across 4 quality tiers

Excellent

5 (4.5%)

Very Good

42 (38.2%)

Good

25 (22.7%)

Average

38 (34.5%)

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Lab-Grown H SI2Same 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