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Radiant|Lab Grown|IGI

1.03ct D SI2 Radiant Lab Grown Diamond

ID • D/SI2 • IGI LG472171381

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

Certificate IGI LG472171381

Diamond specifications and retailer prices

From £471 GBP
As of November 6, 2026
Save £934 GBP (66%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,546 GBP at NZ Jewellers · As of November 6, 2026
View at NZ Jewellers

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG472171381 or 472171381. Listed at 12 retailers as of November 4, 2026, with a 198% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.7°
Pavilion angle30.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG472171381
Dimensions6.46 × 5.10 × 3.47 mm
L/W Ratio1.27
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
6.46 mm5.10 mm1.03 ctD / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG472171381
Side View
Table 62.5%Crown 41.7°Girdle: Slightly ThickPavilion 30.3°Culet: NoneDepth 68.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,546 GBP|Low: £455 GBP|High: £2,343 GBP|Avg: £919 GBP
NZ Jewellers
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 6£471 GBP
Retailer 9£474 GBP
Retailer 12£516 GBP
Retailer 4£530 GBP
Retailer 3£550 GBP
Retailer 10£550 GBP
Retailer 2£780 GBP
Retailer 5£869 GBP
Retailer 11£898 GBP
Retailer 8£1,405 GBP
NZ Jewellers£1,546 GBP
Retailer 7£2,318 GBP

44 data points across 12 retailers

12 retailers£471 GBP to £1,405 GBP

B+
Cheapest Retailer
-
£471 GBP
B+
Retailer 2
-
£474 GBP
View
B
Retailer 3
-
£516 GBP
View
B
Retailer 4
-
£530 GBP
View
Final sale: no returns
Retailer 5
-
£550 GBP
View
Price last confirmed 22 days ago
B
Retailer 6
-
£550 GBP
View
B
Retailer 7
-
£780 GBP
View
B
Retailer 8
-
£869 GBP
View
B
Retailer 9
-
£898 GBP
View
B
Retailer 10
-
£1,405 GBP
View
Most Expensive
NZ Jewellers
778fde8f-ec66-46ae-9a88-26e73e576dcc · Nov 6
£1,546 GBP
$2,069 USD
View
Price under review
10 more retailers have this diamond
Prices start from £471 GBPSave up to £934 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.

B+
1.03ct Radiant
£471 GBP