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Round|Lab Grown|IGI

1.20ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG628452901

Shape and cutting style on the report: Round brilliant

Certificate IGI LG628452901

Diamond specifications and retailer prices

From £332 GBP
A$688 AUD
As of November 6, 2026
2 retailers carry this diamond
Most expensive: £332 GBP at GemTrove
View at GemTrove

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG628452901 or 628452901. Listed at 2 retailers as of November 6, 2026. 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

1.20
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG628452901
Dimensions6.94 × 6.90 × 4.10 mm
L/W Ratio1.01
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
6.94 mm6.90 mm1.20 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG628452901
Side View
Table 59.0%Crown 33.4°Girdle: THN-MEDPavilion 40.5°Culet: NoneDepth 59.2%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: £332 GBP|Low: £131 GBP|High: £453 GBP|Avg: £272 GBP
GemTrove
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 31, 2026
Retailer 3£131 GBP
Retailer 2£212 GBP
Retailer 6£227 GBP
Retailer 7£238 GBP
Retailer 8£267 GBP
Retailer 5£313 GBP
GemTrove£332 GBP
Retailer 4£453 GBP

5 data points across 8 retailers

2 retailers

Retailer 1
-
£131 GBP
Price last confirmed 52 days ago
Most Expensive
B+
GemTrove
GT-L-01188230-98 · Nov 6
£332 GBP
A$688 AUD
View
1 more retailer has this diamond

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+
1.20ct Round
£332 GBP