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3.55ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG632401238

Shape and cutting style on the report: Round brilliant

Certificate IGI LG632401238

Diamond specifications and retailer prices

From £961 GBP
CA$1,789 CAD
As of October 30, 2026
Save £310 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,272 GBP at The Diamond Guys · As of October 30, 2026
View at The Diamond Guys

About this 3.55ct lab-grown round diamond

This 3.55ct 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 LG632401238 or 632401238. Listed at 2 retailers as of October 30, 2026, with prices from £961 to £1,272, a £310 spread on the same certified stone. The Diamond Guys lists it at £1,272. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG632401238
Dimensions9.87 × 9.84 × 5.97 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.87 mm9.84 mm3.55 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG632401238
Side View
Table 58.0%Crown 34.1°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: £522 GBP|Low: £195 GBP|High: £2,612 GBP|Avg: £1,108 GBP|-15.9%
Retailer 1
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Retailer 3
Retailer 4
Retailer 5
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Retailer 12
The Diamond Guys
September 16, 2026
Retailer 6£337 GBP
Retailer 3£473 GBP
Retailer 1£522 GBP
Retailer 5£625 GBP
Retailer 2£672 GBP
Retailer 11£830 GBP
Retailer 4£926 GBP
Retailer 7£961 GBP
Retailer 9£1,107 GBP
Retailer 12£1,265 GBP
The Diamond Guys£1,272 GBP
Retailer 10£1,599 GBP
Retailer 8£1,978 GBP

61 data points across 13 retailers

2 retailers£961 GBP to £1,272 GBP

B+
Cheapest Retailer
-
£961 GBP
CA$1,789 CAD
Most Expensive
B
The Diamond Guys
1954434268 · Oct 30
£1,272 GBP
$1,704 USD
View
1 more retailer has this diamond
Prices start from £961 GBPSave up to £310 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.

B+
3.55ct Round
£961 GBP