CaratHunter
Plans
Round|Lab Grown|IGI

1.20ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG602308624

Shape and cutting style on the report: Round brilliant

Certificate IGI LG602308624

Diamond specifications and retailer prices

From £309 GBP
As of November 6, 2026
Save £566 GBP (65%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £875 GBP at MOH London · As of November 1, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG602308624 or 602308624. Listed at 2 retailers as of November 1, 2026, with prices from £309 to £875, a £566 spread on the same certified stone. MOH London lists it at £875. 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
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG602308624
Dimensions6.77 × 6.71 × 4.22 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process.
Top View
6.77 mm6.71 mm1.20 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG602308624
Side View
Table 56.0%Crown 36.1°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £875 GBP|Low: £276 GBP|High: £885 GBP|Avg: £461 GBP|+1.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 2£309 GBP
Retailer 4£324 GBP
Retailer 5£338 GBP
Retailer 7£393 GBP
Retailer 6£403 GBP
Retailer 3£524 GBP
Retailer 8£542 GBP
MOH London£875 GBP

11 data points across 8 retailers

2 retailers£309 GBP to £875 GBP

B+
Cheapest Retailer
-
£309 GBP
Most Expensive
B
MOH London
LG602308624 · Nov 1
£875 GBP
View
1 more retailer has this diamond
Prices start from £309 GBPSave up to £566 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+
1.20ct Round
£309 GBP