How much does a 5.00ct+ H SI1 natural oval diamond cost?

As of September 2026, 5.00ct+ H SI1 natural oval diamonds typically cost HK$638,422 HKD to HK$1,979,973 HKD, with a median price of HK$908,384 HKD. There are currently 126 diamonds matching this specification available across retailers.

Where can I find the best price on a H SI1 oval diamond?

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5.00ct+ H SI1 Natural Oval

Quick answer

As of September 2026, there are 126 natural oval diamonds with H colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run HK$638,422 HKD to HK$1,979,973 HKD, with a median of HK$908,384 HKD. At least 9 retailers stock this exact specification. Half of all listings fall between HK$118,377 HKD and HK$181,742 HKD per carat. The same specification in lab grown form lists at a median of about HK$3,656 HKD 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

126

Lowest Price

HK$283,558 HKD

Highest Price

HK$5,313,293 HKD

Average Price

HK$1,159,337 HKD

Market Intelligence

Retailers Selling

Price Spread

41.8%

Price Range

Price per carat distribution across retailers

$19,717/ct

10th Percentile

$11,431

Median

$19,717

90th Percentile

$26,497

Score Distribution

126 diamonds scored across 4 quality tiers

Excellent

1 (0.8%)

Very Good

25 (19.8%)

Good

53 (42.1%)

Average

47 (37.3%)

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Consider Instead

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

Lab-Grown H SI1Same 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