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1.20ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG847634770

Shape and cutting style on the report: Round brilliant

Certificate IGI LG847634770

Diamond specifications and retailer prices

From £243 GBP
As of November 5, 2026
Save £415 GBP (63%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £658 GBP at MOH London · As of November 4, 2026
View at MOH London

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 LG847634770 or 847634770. Listed at 7 retailers as of November 4, 2026, with prices from £243 to £658, a £415 spread on the same certified stone. MOH London lists it at £658. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35.5°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG847634770
Dimensions6.82 × 6.90 × 4.08 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.82 mm6.90 mm1.20 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG847634770
Side View
Table 63.0%Crown 35.5°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 59.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £658 GBP|Low: £233 GBP|High: £662 GBP|Avg: £335 GBP|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 5£240 GBP
Retailer 3£243 GBP
Retailer 7£257 GBP
Retailer 6£269 GBP
Retailer 2£273 GBP
Retailer 4£357 GBP
MOH London£658 GBP

12 data points across 7 retailers

7 retailers£243 GBP to £658 GBP

Retailer 1
-
£240 GBP
Price last confirmed 8 days ago
A
Retailer 2
-
£243 GBP
View
B+
Retailer 3
-
£257 GBP
View
A
Retailer 4
-
£269 GBP
View
A
Retailer 5
-
£273 GBP
View
B+
Retailer 6
-
£357 GBP
View
Most Expensive
B
MOH London
LG847634770 · Nov 4
£658 GBP
View
6 more retailers have this diamond
Prices start from £243 GBPSave up to £415 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
1.20ct Round
£243 GBP