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Round|Lab Grown|IGI

1.05ct G SI1 Round Lab Grown Diamond

ID • G/SI1 • IGI LG818686964

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818686964

Diamond specifications and retailer prices

From £103 GBP
As of November 5, 2026
Save £494 GBP (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £597 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.05ct lab-grown round diamond

This 1.05ct 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 LG818686964 or 818686964. Listed at 13 retailers as of November 4, 2026, with prices from £103 to £597, a £494 spread on the same certified stone. MOH London lists it at £597. 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

1.05
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle40.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818686964
Dimensions6.53 × 6.58 × 3.98 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.53 mm6.58 mm1.05 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818686964
Side View
Table 57.0%Crown 34.9°Girdle: MediumPavilion 40.3°Culet: NoneDepth 60.6%

Caratlytics Score

How it works →
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: Nov 5
Current: £597 GBP|Low: £103 GBP|High: £633 GBP|Avg: £308 GBP|-4.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9£103 GBP
Retailer 8£120 GBP
Retailer 4£128 GBP
Retailer 5£214 GBP
Retailer 2£227 GBP
Retailer 10£237 GBP
Retailer 11£239 GBP
Retailer 6£305 GBP
Retailer 7£325 GBP
Retailer 3£412 GBP
Retailer 12£452 GBP
MOH London£597 GBP

45 data points across 12 retailers

13 retailers£103 GBP to £597 GBP

A
Cheapest Retailer
-
£103 GBP
A
Retailer 2
-
£120 GBP
View
A
Retailer 3
-
£128 GBP
View
Retailer 4
-
£134 GBP
View
Price last confirmed 12 days ago
A
Retailer 5
-
£214 GBP
View
A
Retailer 6
-
£227 GBP
View
A
Retailer 7
-
£237 GBP
View
A
Retailer 8
-
£239 GBP
View
B+
Retailer 9
-
£305 GBP
View
B+
Retailer 10
-
£325 GBP
View
B
Retailer 11
-
£412 GBP
View
B
Retailer 12
-
£452 GBP
View
Most Expensive
B
MOH London
LG818686964 · Nov 4
£597 GBP
View
12 more retailers have this diamond
Prices start from £103 GBPSave up to £494 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
1.05ct Round
£103 GBP