How much does a 3.00 to 4.99ct E SI1 lab grown round diamond cost?

As of September 2026, 3.00 to 4.99ct E SI1 lab grown round diamonds typically cost $1,030 NZD to $5,050 NZD, with a median price of $2,038 NZD. There are currently 1,212 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct E SI1 Lab Grown Round

Quick answer

As of September 2026, there are 1,212 lab grown round diamonds with E colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run $1,030 NZD to $5,050 NZD, with a median of $2,038 NZD. At least 34 retailers stock this exact specification. Half of all listings fall between $451 NZD and $1,048 NZD per carat. The same specification in natural form lists at a median of about $33,087 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. 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

1,212

Lowest Price

$459 NZD

Highest Price

$247,626 NZD

Average Price

$2,938 NZD

Market Intelligence

Retailers Selling

Price Spread

90.6%

Price Range

Price per carat distribution across retailers

$381/ct

10th Percentile

$217

Median

$381

90th Percentile

$969

Score Distribution

1.2K diamonds scored across 4 quality tiers

Excellent

242 (20.0%)

Very Good

208 (17.2%)

Good

159 (13.1%)

Average

603 (49.8%)

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Consider Instead

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

F SI1F colour is visually identical to E to the naked eye

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E SI2SI2 inclusions are not visible without magnification

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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