How much does a 5.00ct+ J I1 natural round diamond cost?

As of September 2026, 5.00ct+ J I1 natural round diamonds typically cost $25,238 SGD to $110,429 SGD, with a median price of $57,026 SGD. There are currently 27 diamonds matching this specification available across retailers.

Where can I find the best price on a J I1 round diamond?

About 51% of these diamonds are available at multiple retailers, with an average price spread of 40%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ J I1 Natural Round

Quick answer

As of September 2026, there are 27 natural round diamonds with J colour and I1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $25,238 SGD to $110,429 SGD, with a median of $57,026 SGD. At least 11 retailers stock this exact specification, and 51% of the stones appear at more than one of them, with an average price spread of 40%. Half of all listings fall between $4,185 SGD and $6,487 SGD per carat. The same specification in lab grown form lists at a median of about $8,393 SGD per carat. Over the last 30 days the median price moved -40.3% and the number of listings moved -70.1%.

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

Lowest Price

$19,956 SGD

Highest Price

$204,841 SGD

Average Price

$66,652 SGD

Market Intelligence

Retailers Selling

Cross Retailer %

51.3%

Price Spread

40.1%

30-Day Price Trend

-40.3%

30-Day Supply Change

-70.1%

Volatility (30d)

0.02

Price Range

Price per carat distribution across retailers

$4,515/ct

10th Percentile

$2,737

Median

$4,515

90th Percentile

$5,755

Score Distribution

27 diamonds scored across 3 quality tiers

Very Good

5 (18.5%)

Good

7 (25.9%)

Average

15 (55.6%)

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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