How much does a 5.00ct+ G SI1 lab grown round diamond cost?

As of September 2026, 5.00ct+ G SI1 lab grown round diamonds typically cost $1,169 SGD to $10,071 SGD, with a median price of $2,301 SGD. There are currently 289 diamonds matching this specification available across retailers.

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

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

5.00ct+ G SI1 Lab Grown Round

Quick answer

As of September 2026, there are 289 lab grown round diamonds with G colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $1,169 SGD to $10,071 SGD, with a median of $2,301 SGD. At least 24 retailers stock this exact specification. Half of all listings fall between $435 SGD and $1,118 SGD per carat. The same specification in natural form lists at a median of about $33,790 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. Round lab grown stones in the index: 438 USD per carat, -14.1% 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

289

Lowest Price

$730 SGD

Highest Price

$290,395 SGD

Average Price

$5,406 SGD

Market Intelligence

Retailers Selling

Price Spread

103.2%

Price Range

Price per carat distribution across retailers

$520/ct

10th Percentile

$276

Median

$520

90th Percentile

$1,414

Score Distribution

289 diamonds scored across 4 quality tiers

Excellent

74 (25.6%)

Very Good

95 (32.9%)

Good

57 (19.7%)

Average

63 (21.8%)

Find Your Diamond

Search 289 G SI1 round diamonds and compare prices.

Search Diamonds

Consider Instead

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

G SI2SI2 inclusions are not visible without magnification

Save 13%

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