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Radiant|Lab Grown|IGI

1.28ct H VS1 Radiant Lab Grown Diamond

ID • H/VS1 • IGI LG514252408

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

Certificate IGI LG514252408

Diamond specifications and retailer prices

From £681 GBP
As of November 4, 2026
Save £772 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £2,222 GBP at NZ Jewellers · As of November 4, 2026
View at NZ Jewellers

About this 1.28ct lab-grown radiant diamond

This 1.28ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG514252408 or 514252408. Listed at 15 retailers as of November 3, 2026, with a 113% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.7°
Pavilion angle29.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG514252408
Dimensions7.62 × 5.39 × 3.42 mm
L/W Ratio1.41
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
7.62 mm5.39 mm1.28 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG514252408
Side View
Table 64.5%Crown 38.7°Girdle: MED-STKPavilion 29.3°Culet: NoneDepth 63.5%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: £2,222 GBP|Low: £654 GBP|High: £2,711 GBP|Avg: £1,474 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
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 5, 2026
Retailer 14£681 GBP
Retailer 3£741 GBP
Retailer 5£762 GBP
Retailer 4£790 GBP
Retailer 16£790 GBP
Retailer 15£914 GBP
Retailer 12£921 GBP
Retailer 8£1,161 GBP
Retailer 17£1,266 GBP
Retailer 10£1,453 GBP
Retailer 13£1,758 GBP
Retailer 11£2,058 GBP
Retailer 6£2,185 GBP
NZ Jewellers£2,222 GBP
Retailer 9£2,262 GBP
Retailer 7£2,360 GBP
Retailer 2£2,672 GBP

29 data points across 17 retailers

15 retailers£681 GBP to £1,453 GBP

B
Cheapest Retailer
-
£681 GBP
B
Retailer 2
-
£741 GBP
View
B
Retailer 3
-
£762 GBP
View
Final sale: no returns
Retailer 4
-
£790 GBP
View
Price last confirmed 19 days ago
B
Retailer 5
-
£790 GBP
View
B
Retailer 6
-
£914 GBP
View
B
Retailer 7
-
£921 GBP
View
B
Retailer 8
-
£1,266 GBP
View
B
Retailer 9
-
£1,453 GBP
View
Retailer 10
-
£1,758 GBP
View
Price under review
Retailer 11
-
£2,058 GBP
View
Price under review
Retailer 12
-
£2,185 GBP
View
Price under review
Most Expensive
NZ Jewellers
101cae82-76f5-43fb-98f3-10dc23d3a83f · Nov 4
£2,222 GBP
$2,990 USD
View
Price under review
12 more retailers have this diamond
Prices start from £681 GBPSave up to £772 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
1.28ct Radiant
£681 GBP