How much does a 3.00 to 4.99ct I SI1 lab grown emerald diamond cost?

As of September 2026, 3.00 to 4.99ct I SI1 lab grown emerald diamonds typically cost $3,861 NZD to $12,871 NZD, with a median price of $9,385 NZD. There are currently 79 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct I SI1 Lab Grown Emerald

Quick answer

As of September 2026, there are 79 lab grown emerald diamonds with I colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $3,861 NZD to $12,871 NZD, with a median of $9,385 NZD. At least 20 retailers stock this exact specification. Half of all listings fall between $607 NZD and $2,973 NZD per carat. The same specification in natural form lists at a median of about $21,719 NZD 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 lab grown stones in the index: 494 USD per carat, -6.7% 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

$957 NZD

Highest Price

$13,875 NZD

Average Price

$9,353 NZD

Market Intelligence

Retailers Selling

Price Spread

85.2%

Price Range

Price per carat distribution across retailers

$1,667/ct

10th Percentile

$246

Median

$1,667

90th Percentile

$1,881

Score Distribution

79 diamonds scored across 4 quality tiers

Excellent

2 (2.5%)

Very Good

2 (2.5%)

Good

13 (16.5%)

Average

62 (78.5%)

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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