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Radiant|Lab Grown|IGI

1.50ct F SI1 Radiant Lab Grown Diamond

ID • F/SI1 • IGI LG512225938

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

Certificate IGI LG512225938

Diamond specifications and retailer prices

From £1,218 GBP
As of November 6, 2026
Save £1,040 GBP (46%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,693 GBP at NZ Jewellers · As of November 6, 2026
View at NZ Jewellers

About this 1.5ct lab-grown radiant diamond

This 1.5ct lab-grown radiant sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512225938 or 512225938. Listed at 13 retailers as of November 6, 2026, with a 85% 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

1.50
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.4°
Pavilion angle35°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512225938
Dimensions7.52 × 5.83 × 3.95 mm
L/W Ratio1.29
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.52 mm5.83 mm1.50 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512225938
Side View
Table 66.0%Crown 42.4°Girdle: STK-THKPavilion 35°Culet: NoneDepth 67.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £2,016 GBP|Low: £1,189 GBP|High: £4,158 GBP|Avg: £2,191 GBP|-2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 6£1,218 GBP
Retailer 5£1,239 GBP
Retailer 9£1,387 GBP
Retailer 7£1,437 GBP
Retailer 10£1,565 GBP
Retailer 1£2,016 GBP
Retailer 8£2,258 GBP
Retailer 4£2,477 GBP
Retailer 2£3,951 GBP
Retailer 3£4,093 GBP

45 data points across 10 retailers

13 retailers£1,218 GBP to £2,258 GBP

B
Cheapest Retailer
-
£1,218 GBP
B
Retailer 2
-
£1,239 GBP
View
B
Retailer 3
-
£1,348 GBP
View
B
Retailer 4
-
£1,387 GBP
View
Final sale: no returns
Retailer 5
-
£1,437 GBP
View
Price last confirmed 26 days ago
B
Retailer 6
-
£1,437 GBP
View
B
Retailer 7
-
£1,565 GBP
View
B
Retailer 8
-
£2,016 GBP
View
B
Retailer 9
-
£2,258 GBP
View
Retailer 10
-
£2,477 GBP
View
Price under review
Most Expensive
NZ Jewellers
58615348-14eb-4e0a-924d-935e33d6be81 · Nov 6
£2,693 GBP
$3,605 USD
View
Price under review
10 more retailers have this diamond
Prices start from £1,218 GBPSave up to £1,040 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
1.50ct Radiant
£1,218 GBP