How much does a 5.00ct+ I SI1 natural emerald diamond cost?

As of September 2026, 5.00ct+ I SI1 natural emerald diamonds typically cost €34,504 EUR to €196,370 EUR, with a median price of €77,968 EUR. There are currently 58 diamonds matching this specification available across retailers.

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

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5.00ct+ I SI1 Natural Emerald

Quick answer

As of September 2026, there are 58 natural emerald diamonds with I colour and SI1 clarity in the 5.00ct+ range available across retailers worldwide. Prices typically run €34,504 EUR to €196,370 EUR, with a median of €77,968 EUR. At least 9 retailers stock this exact specification. Half of all listings fall between €19,384 EUR and €25,422 EUR per carat. The same specification in lab grown form lists at a median of about €528 EUR 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. Emerald natural stones in the index: 2,166 USD per carat, -6.6% 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

€21,155 EUR

Highest Price

€406,761 EUR

Average Price

€100,763 EUR

Market Intelligence

Retailers Selling

Price Spread

28.4%

Price Range

Price per carat distribution across retailers

$24,490/ct

10th Percentile

$16,796

Median

$24,490

90th Percentile

$33,698

Score Distribution

58 diamonds scored across 4 quality tiers

Excellent

10 (17.2%)

Very Good

21 (36.2%)

Good

10 (17.2%)

Average

17 (29.3%)

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Consider Instead

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

I SI2SI2 inclusions are not visible without magnification

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Lab-Grown I 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