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

As of September 2026, 5.00ct+ D SI2 natural round diamonds typically cost $64,515 USD to $196,591 USD, with a median price of $102,285 USD. There are currently 127 diamonds matching this specification available across retailers.

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

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5.00ct+ D SI2 Natural Round

Quick answer

As of September 2026, there are 127 natural round diamonds with D color and SI2 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $64,515 USD to $196,591 USD, with a median of $102,285 USD. At least 39 retailers stock this exact specification. Half of all listings fall between $15,998 USD and $21,278 USD per carat. The same specification in lab grown form lists at a median of about $473 USD 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

127

Lowest Price

$37,944 USD

Highest Price

$1,673,700 USD

Average Price

$137,278 USD

Market Intelligence

Retailers Selling

Price Spread

28.1%

Price Range

Price per carat distribution across retailers

$18,805/ct

10th Percentile

$12,124

Median

$18,805

90th Percentile

$23,494

Score Distribution

127 diamonds scored across 4 quality tiers

Excellent

46 (36.2%)

Very Good

29 (22.8%)

Good

27 (21.3%)

Average

25 (19.7%)

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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