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Round|Lab Grown|IGI

1.05ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG783638340

Shape and cutting style on the report: Round brilliant

Certificate IGI LG783638340

Diamond specifications and retailer prices

From £108 GBP
As of November 5, 2026
Save £517 GBP (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £625 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG783638340 or 783638340. Listed at 16 retailers as of November 4, 2026, with prices from £108 to £625, a £517 spread on the same certified stone. MOH London lists it at £625. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG783638340
Dimensions6.51 × 6.47 × 4.03 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.51 mm6.47 mm1.05 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG783638340
Side View
Table 58.0%Crown 34.9°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 62.1%

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: Nov 5
Current: £625 GBP|Low: £104 GBP|High: £633 GBP|Avg: £291 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 6£108 GBP
Retailer 7£134 GBP
Retailer 3£228 GBP
Retailer 2£236 GBP
Retailer 8£247 GBP
Retailer 10£283 GBP
Retailer 9£317 GBP
Retailer 4£342 GBP
Retailer 5£455 GBP
MOH London£625 GBP

43 data points across 10 retailers

16 retailers£108 GBP to £625 GBP

A
Cheapest Retailer
-
£108 GBP
A
Retailer 2
-
£126 GBP
View
Retailer 3
-
£134 GBP
View
Price last confirmed 12 days ago
A
Retailer 4
-
£134 GBP
View
A
Retailer 5
-
£215 GBP
View
A
Retailer 6
-
£228 GBP
View
A
Retailer 7
-
£236 GBP
View
A
Retailer 8
-
£247 GBP
View
Retailer 9
-
£283 GBP
View
Price last confirmed 65 days ago
B+
Retailer 10
-
£317 GBP
View
B+
Retailer 11
-
£342 GBP
View
B+
Retailer 12
-
£347 GBP
View
B
Retailer 13
-
£430 GBP
View
B
Retailer 14
-
£455 GBP
View
B
Retailer 15
-
£471 GBP
View
Most Expensive
B
MOH London
LG783638340 · Nov 4
£625 GBP
View
15 more retailers have this diamond
Prices start from £108 GBPSave up to £517 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
£108 GBP