How much does a 3.00 to 4.99ct I SI2 natural oval diamond cost?

As of September 2026, 3.00 to 4.99ct I SI2 natural oval diamonds typically cost $18,173 SGD to $61,874 SGD, with a median price of $34,660 SGD. There are currently 697 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct I SI2 Natural Oval

Quick answer

As of September 2026, there are 697 natural oval diamonds with I colour and SI2 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $18,173 SGD to $61,874 SGD, with a median of $34,660 SGD. At least 48 retailers stock this exact specification. Half of all listings fall between $7,817 SGD and $14,062 SGD per carat. The same specification in lab grown form lists at a median of about $17,985 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. 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

697

Lowest Price

$8,775 SGD

Highest Price

$199,706 SGD

Average Price

$37,724 SGD

Market Intelligence

Retailers Selling

Price Spread

55.0%

Price Range

Price per carat distribution across retailers

$8,928/ct

10th Percentile

$4,874

Median

$8,928

90th Percentile

$12,676

Score Distribution

697 diamonds scored across 5 quality tiers

Exceptional

1 (0.1%)

Excellent

98 (14.1%)

Very Good

273 (39.2%)

Good

180 (25.8%)

Average

145 (20.8%)

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J SI2J colour is visually identical to I to the naked eye

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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