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

As of September 2026, 5.00ct+ H SI2 natural round diamonds typically cost $54,537 SGD to $213,144 SGD, with a median price of $106,313 SGD. There are currently 281 diamonds matching this specification available across retailers.

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

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5.00ct+ H SI2 Natural Round

Quick answer

As of September 2026, there are 281 natural round diamonds with H colour and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $54,537 SGD to $213,144 SGD, with a median of $106,313 SGD. At least 12 retailers stock this exact specification. Half of all listings fall between $15,201 SGD and $26,118 SGD per carat. The same specification in lab grown form lists at a median of about $13,759 SGD 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. Round natural stones in the index: 2,094 USD per carat, -3.8% 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

281

Lowest Price

$22,974 SGD

Highest Price

$462,244 SGD

Average Price

$123,486 SGD

Market Intelligence

Retailers Selling

Price Spread

47.6%

Price Range

Price per carat distribution across retailers

$18,024/ct

10th Percentile

$9,173

Median

$18,024

90th Percentile

$21,386

Score Distribution

281 diamonds scored across 4 quality tiers

Excellent

60 (21.4%)

Very Good

81 (28.8%)

Good

64 (22.8%)

Average

76 (27.0%)

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Consider Instead

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

H I1I1 inclusions are not visible without magnification

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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