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

As of September 2026, 3.00 to 4.99ct E SI1 lab grown asscher diamonds typically cost £511 GBP to £4,620 GBP, with a median price of £1,257 GBP. There are currently 37 diamonds matching this specification available across retailers.

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

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3.00 to 4.99ct E SI1 Lab Grown Asscher

Quick answer

As of September 2026, there are 37 lab grown asscher diamonds with E colour and SI1 clarity in the 3.00 to 4.99ct range available across retailers worldwide. Prices typically run £511 GBP to £4,620 GBP, with a median of £1,257 GBP. At least 19 retailers stock this exact specification. Half of all listings fall between £204 GBP and £904 GBP per carat. The same specification in natural form lists at a median of about £13,011 GBP 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. Asscher lab grown stones in the index: 526 USD per carat, +3.3% 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

£260 GBP

Highest Price

£6,576 GBP

Average Price

£2,225 GBP

Market Intelligence

Retailers Selling

Price Spread

193.6%

Price Range

Price per carat distribution across retailers

$488/ct

10th Percentile

$216

Median

$488

90th Percentile

$1,559

Score Distribution

37 diamonds scored across 4 quality tiers

Excellent

9 (24.3%)

Very Good

9 (24.3%)

Good

7 (18.9%)

Average

12 (32.4%)

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

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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