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

As of October 2026, 5.00ct+ G SI1 natural princess diamonds typically cost $79,552 USD to $169,182 USD, with a median price of $105,098 USD. There are currently 5 diamonds matching this specification available across retailers.

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

About 41% of these diamonds are available at multiple retailers, with an average price spread of 39%. A comparison tool like Carat Hunter lets you see all the prices side by side.

5.00ct+ G SI1 Natural Princess

Quick answer

As of October 2026, there are 5 natural princess diamonds with G color and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run $79,552 USD to $169,182 USD, with a median of $105,098 USD. At least 35 retailers stock this exact specification, and 41% of the stones appear at more than one of them, with an average price spread of 39%. Half of all listings fall between $15,956 USD and $23,433 USD per carat. The same specification in lab grown form lists at a median of about $271 USD per carat. Over the last 30 days the median price moved +4.1% and the number of listings moved -4.3%.

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. Princess natural stones in the index: 2,158 USD per carat, +5.7% 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

$63,248 USD

Highest Price

$240,767 USD

Average Price

$115,896 USD

Market Intelligence

Retailers Selling

Cross Retailer %

41.4%

Price Spread

39.0%

30-Day Price Trend

+4.1%

30-Day Supply Change

-4.3%

Volatility (30d)

0.01

Price Range

Price per carat distribution across retailers

$19,197/ct

10th Percentile

$13,854

Median

$19,197

90th Percentile

$25,886

Score Distribution

18 diamonds scored across 4 quality tiers

Excellent

2 (11.1%)

Very Good

2 (11.1%)

Good

6 (33.3%)

Average

8 (44.4%)

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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

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Lab-Grown G SI1Same specifications, lab-grown origin

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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