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3.54ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG620433613

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620433613

Diamond specifications and retailer prices

From £643 GBP
€815 EUR
As of October 29, 2026
Save £1,865 GBP (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,508 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 3.54ct lab-grown round diamond

This 3.54ct lab-grown round sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620433613 or 620433613. Listed at 14 retailers as of October 29, 2026, with prices from £643 to £2,508, a £1,865 spread on the same certified stone. Brilliant Earth lists it at £2,508. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.54
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620433613
Dimensions9.90 × 9.85 × 5.93 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
9.90 mm9.85 mm3.54 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620433613
Side View
Table 58.0%Crown 33.8°Girdle: THN-MEDPavilion 40.6°Culet: NoneDepth 60.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £2,508 GBP|Low: £507 GBP|High: £2,756 GBP|Avg: £1,056 GBP|-9.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 10£538 GBP
Retailer 4£643 GBP
Retailer 5£653 GBP
Retailer 9£725 GBP
Retailer 7£751 GBP
Retailer 2£774 GBP
Retailer 8£852 GBP
Retailer 6£1,204 GBP
Retailer 3£1,959 GBP
Brilliant Earth£2,508 GBP

37 data points across 10 retailers

14 retailers£643 GBP to £2,508 GBP

Retailer 1
-
£321 GBP
$427 USD
Price last confirmed 37 days ago
Retailer 2
-
£359 GBP
$478 USD
View
Price last confirmed 36 days ago
Retailer 3
-
£393 GBP
$523 USD
View
Price last confirmed 32 days ago
Retailer 4
-
£538 GBP
View
Price last confirmed 22 days ago
A
Retailer 5
-
£643 GBP
€815 EUR
View
B+
Retailer 6
-
£653 GBP
$870 USD
View
B+
Retailer 7
-
£725 GBP
$966 USD
View
B+
Retailer 8
-
£751 GBP
$1,000 USD
View
B+
Retailer 9
-
£774 GBP
View
B+
Retailer 10
-
£852 GBP
$1,134 USD
View
B
Retailer 11
-
£1,204 GBP
$1,604 USD
View
Retailer 12
-
£1,279 GBP
$1,703 USD
View
Price last confirmed 33 days ago
B
Retailer 13
-
£1,959 GBP
View
Most Expensive
B
Brilliant Earth
9147870A · Oct 29
£2,508 GBP
$3,340 USD
View
13 more retailers have this diamond
Prices start from £643 GBPSave up to £1,865 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
3.54ct Round
£643 GBP