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Radiant|Lab Grown|IGI

1.41ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG778667508

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG778667508

Diamond specifications and retailer prices

From £140 GBP
As of November 2, 2026
Save £673 GBP (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £813 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.41ct lab-grown radiant diamond

This 1.41ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778667508 or 778667508. Listed at 12 retailers as of November 2, 2026, with prices from £140 to £813, a £673 spread on the same certified stone. MOH London lists it at £813. 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

1.41
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle36.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778667508
Dimensions8.02 × 5.53 × 3.84 mm
L/W Ratio1.45
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.02 mm5.53 mm1.41 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778667508
Side View
Table 63.0%Crown 33.3°Girdle: MED-STKPavilion 36.2°Culet: NoneDepth 69.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 2
Current: £813 GBP|Low: £134 GBP|High: £823 GBP|Avg: £377 GBP
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 8£140 GBP
Retailer 12£163 GBP
Retailer 9£174 GBP
Retailer 5£294 GBP
Retailer 11£305 GBP
Retailer 2£312 GBP
Retailer 3£364 GBP
Retailer 4£402 GBP
Retailer 6£493 GBP
Retailer 10£559 GBP
Retailer 7£561 GBP
MOH London£813 GBP

43 data points across 12 retailers

12 retailers£140 GBP to £813 GBP

A
Cheapest Retailer
-
£140 GBP
A
Retailer 2
-
£163 GBP
View
A
Retailer 3
-
£174 GBP
View
A
Retailer 4
-
£294 GBP
View
B+
Retailer 5
-
£305 GBP
View
A
Retailer 6
-
£312 GBP
View
A
Retailer 7
-
£364 GBP
View
A
Retailer 8
-
£402 GBP
View
B+
Retailer 9
-
£493 GBP
View
B+
Retailer 10
-
£559 GBP
View
B+
Retailer 11
-
£561 GBP
View
Most Expensive
B
MOH London
LG778667508 · Nov 2
£813 GBP
View
11 more retailers have this diamond
Prices start from £140 GBPSave up to £673 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
1.41ct Radiant
£140 GBP