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Radiant|Lab Grown|IGI

1.03ct D SI1 Radiant Lab Grown Diamond

EX • D/SI1 • IGI LG831674386

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

Certificate IGI LG831674386

Diamond specifications and retailer prices

From £102 GBP
As of November 6, 2026
Save £497 GBP (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £600 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1.03ct lab-grown radiant diamond

This 1.03ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG831674386 or 831674386. Listed at 9 retailers as of November 1, 2026, with prices from £102 to £600, a £497 spread on the same certified stone. MOH London lists it at £600. 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

1.03
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.2°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831674386
Dimensions7.02 × 5.07 × 3.31 mm
L/W Ratio1.38
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.02 mm5.07 mm1.03 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831674386
Side View
Table 67.0%Crown 44.2°Girdle: MediumPavilion 34.5°Culet: NoneDepth 65.3%

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 6
Current: £600 GBP|Low: £101 GBP|High: £615 GBP|Avg: £324 GBP|-1.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3£102 GBP
Retailer 6£119 GBP
Retailer 2£151 GBP
Retailer 7£227 GBP
Retailer 8£368 GBP
Retailer 4£408 GBP
Retailer 5£430 GBP
Retailer 9£438 GBP
MOH London£600 GBP

31 data points across 9 retailers

9 retailers£102 GBP to £600 GBP

A
Cheapest Retailer
-
£102 GBP
A
Retailer 2
-
£119 GBP
View
A
Retailer 3
-
£151 GBP
View
A
Retailer 4
-
£227 GBP
View
B+
Retailer 5
-
£368 GBP
View
B
Retailer 6
-
£408 GBP
View
B+
Retailer 7
-
£430 GBP
View
Retailer 8
-
£438 GBP
View
Price last confirmed 25 days ago
Most Expensive
B
MOH London
LG831674386 · Nov 1
£600 GBP
View
8 more retailers have this diamond
Prices start from £102 GBPSave up to £497 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
1.03ct Radiant
£102 GBP