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Round|Lab Grown|IGI

1.05ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG791661826

Shape and cutting style on the report: Round brilliant

Certificate IGI LG791661826

Diamond specifications and retailer prices

From £171 GBP
As of November 6, 2026
Save £883 GBP (84%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,054 GBP at MOH London · As of November 5, 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 LG791661826 or 791661826. Listed at 7 retailers as of November 5, 2026, with prices from £171 to £1,054, a £883 spread on the same certified stone. MOH London lists it at £1,054. 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 angle35.5°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG791661826
Dimensions6.51 × 6.49 × 4.01 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
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
6.51 mm6.49 mm1.05 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG791661826
Side View
Table 59.0%Crown 35.5°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.6%

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 6
Current: £1,054 GBP|Low: £165 GBP|High: £1,070 GBP|Avg: £387 GBP|+4.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5£171 GBP
Retailer 3£212 GBP
Retailer 6£214 GBP
Retailer 2£224 GBP
Retailer 7£311 GBP
Retailer 4£416 GBP
MOH London£1,054 GBP

40 data points across 7 retailers

7 retailers£171 GBP to £1,054 GBP

B+
Cheapest Retailer
-
£171 GBP
A
Retailer 2
-
£212 GBP
View
A
Retailer 3
-
£214 GBP
View
A
Retailer 4
-
£224 GBP
View
B+
Retailer 5
-
£311 GBP
View
B+
Retailer 6
-
£416 GBP
View
Most Expensive
B
MOH London
LG791661826 · Nov 5
£1,054 GBP
View
6 more retailers have this diamond
Prices start from £171 GBPSave up to £883 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
£171 GBP