How much does a 5.00ct+ G SI1 natural radiant diamond cost?

As of September 2026, 5.00ct+ G SI1 natural radiant diamonds typically cost $106,553 SGD to $278,167 SGD, with a median price of $168,316 SGD. There are currently 53 diamonds matching this specification available across retailers.

Where can I find the best price on a G SI1 radiant diamond?

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

5.00ct+ G SI1 Natural Radiant

Quick answer

As of September 2026, there are 53 natural radiant diamonds with G colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $106,553 SGD to $278,167 SGD, with a median of $168,316 SGD. At least 12 retailers stock this exact specification. Half of all listings fall between $24,105 SGD and $28,019 SGD per carat. The same specification in lab grown form lists at a median of about $408 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. Radiant natural stones in the index: 2,765 USD per carat, +6.0% 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

$84,930 SGD

Highest Price

$741,252 SGD

Average Price

$186,038 SGD

Market Intelligence

Retailers Selling

Price Spread

15.2%

Price Range

Price per carat distribution across retailers

$20,350/ct

10th Percentile

$17,211

Median

$20,350

90th Percentile

$22,369

Score Distribution

53 diamonds scored across 4 quality tiers

Excellent

6 (11.3%)

Very Good

9 (17.0%)

Good

20 (37.7%)

Average

18 (34.0%)

Find Your Diamond

Search 53 G SI1 radiant diamonds and compare prices.

Search Diamonds

Consider Instead

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

Lab-Grown G SI1Same specifications, lab-grown origin

Save 98%

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