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Cushion|Lab Grown|IGI

3.55ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG837643067

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG837643067

Diamond specifications and retailer prices

From £804 GBP
$1,077 USD
As of October 30, 2026
Save £3,017 GBP (79%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,821 GBP at Do Amore Diamonds · As of October 31, 2026
View at Do Amore Diamonds

About this 3.55ct lab-grown cushion diamond

This 3.55ct lab-grown cushion 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 LG837643067 or 837643067. Listed at 6 retailers as of October 30, 2026, with prices from £804 to £3,821, a £3,017 spread on the same certified stone. Do Amore Diamonds lists it at £3,821. 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

3.55
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837643067
Dimensions9.01 × 8.95 × 5.82 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.01 mm8.95 mm3.55 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837643067
Side View
Table 66.0%Crown 35.3°Girdle: MED-VTKPavilion 39.7°Culet: NoneDepth 65.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £3,821 GBP|Low: £804 GBP|High: £3,821 GBP|Avg: £1,846 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 6£804 GBP
Retailer 5£832 GBP
Retailer 2£1,006 GBP
Retailer 4£2,060 GBP
Retailer 3£2,466 GBP
Do Amore Diamonds£3,821 GBP

21 data points across 6 retailers

6 retailers£804 GBP to £3,821 GBP

A
Cheapest Retailer
-
£804 GBP
$1,077 USD
A
Retailer 2
-
£832 GBP
$1,115 USD
View
A
Retailer 3
-
£1,006 GBP
View
B
Retailer 4
-
£2,060 GBP
$2,760 USD
View
B
Retailer 5
-
£2,466 GBP
View
Most Expensive
B
Do Amore Diamonds
36-1991044 · Oct 31
£3,821 GBP
$5,120 USD
View
5 more retailers have this diamond
Prices start from £804 GBPSave up to £3,017 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
3.55ct Cushion
£804 GBP