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Round|Lab Grown|IGI

1.09ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG842612901

Shape and cutting style on the report: Round brilliant

Certificate IGI LG842612901

Diamond specifications and retailer prices

From £124 GBP
$166 USD
As of October 30, 2026
Save £518 GBP (81%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £642 GBP at MOH London · As of October 25, 2026
View at MOH London

About this 1.09ct lab-grown round diamond

This 1.09ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG842612901 or 842612901. Listed at 7 retailers as of October 25, 2026, with prices from £124 to £642, a £518 spread on the same certified stone. MOH London lists it at £642. 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

1.09
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG842612901
Dimensions6.58 × 6.56 × 4.09 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.58 mm6.56 mm1.09 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG842612901
Side View
Table 58.0%Crown 34.7°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 62.2%

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: £642 GBP|Low: £225 GBP|High: £648 GBP|Avg: £354 GBP|-1.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 2£227 GBP
Retailer 3£235 GBP
Retailer 5£247 GBP
Retailer 4£254 GBP
Retailer 6£468 GBP
MOH London£642 GBP

16 data points across 6 retailers

7 retailers£124 GBP to £642 GBP

A
Cheapest Retailer
-
£124 GBP
$166 USD
A
Retailer 2
-
£227 GBP
View
A
Retailer 3
-
£235 GBP
€300 EUR
View
A
Retailer 4
-
£247 GBP
$331 USD
View
A
Retailer 5
-
£254 GBP
$340 USD
View
B
Retailer 6
-
£468 GBP
$627 USD
View
Most Expensive
B
MOH London
LG842612901 · Oct 25
£642 GBP
View
6 more retailers have this diamond
Prices start from £124 GBPSave up to £518 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
1.09ct Round
£124 GBP