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

As of November 2026, 5.00ct+ G SI1 natural heart diamonds typically cost $93,909 SGD to $224,752 SGD, with a median price of $120,053 SGD. There are currently 8 diamonds matching this specification available across retailers.

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

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5.00ct+ G SI1 Natural Heart

Quick answer

As of November 2026, there are 8 natural heart diamonds with G colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $93,909 SGD to $224,752 SGD, with a median of $120,053 SGD. The same specification in lab grown form lists at a median of about $609 SGD per carat.

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. Heart natural stones in the index: 2,374 USD per carat, +9.8% 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: November 2026

Available

Lowest Price

$85,252 SGD

Highest Price

$249,531 SGD

Average Price

$144,876 SGD

Score Distribution

22 diamonds scored across 4 quality tiers

Excellent

1 (4.5%)

Very Good

7 (31.8%)

Good

2 (9.1%)

Average

12 (54.5%)

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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