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

As of October 2026, 5.00ct+ J SI1 natural oval diamonds typically cost $47,894 SGD to $171,308 SGD, with a median price of $99,292 SGD. There are currently 37 diamonds matching this specification available across retailers.

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

Compare prices across retailers on Carat Hunter to see all your options.

5.00ct+ J SI1 Natural Oval

Quick answer

As of October 2026, there are 37 natural oval diamonds with J colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $47,894 SGD to $171,308 SGD, with a median of $99,292 SGD.

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

Caratlytics Diamond Price Index, September 2026: natural diamonds at 2,335 USD per carat and lab-grown at 443 USD per carat, a natural to lab ratio of 5.3 to 1. Oval natural stones in the index: 2,655 USD per carat, +10.2% month on month. See the full index release

Figures come from current listings across more than 100 retailers and refresh daily. The index is a monthly release.

Last updated: October 2026

Available

Lowest Price

$37,161 SGD

Highest Price

$759,641 SGD

Average Price

$113,954 SGD

Score Distribution

130 diamonds scored across 4 quality tiers

Excellent

9 (6.9%)

Very Good

26 (20.0%)

Good

20 (15.4%)

Average

75 (57.7%)

Find Your Diamond

Search 37 J SI1 oval diamonds and compare prices.

Search Diamonds

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