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Radiant|Lab Grown|IGI

1.28ct D VVS1 Radiant Lab Grown Diamond

ID • D/VVS1 • IGI LG841629550

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

Certificate IGI LG841629550

Diamond specifications and retailer prices

From £140 GBP
As of November 4, 2026
Save £672 GBP (83%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,328 GBP at Helzberg Diamonds · As of October 13, 2026
View at Helzberg Diamonds

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 D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG841629550 or 841629550. Listed at 21 retailers as of November 4, 2026, with a 479% 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
D
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.2°
Pavilion angle33.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG841629550
Dimensions7.75 × 5.13 × 3.56 mm
L/W Ratio1.51
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.75 mm5.13 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG841629550
Side View
Table 66.0%Crown 46.2°Girdle: STK-THKPavilion 33.8°Culet: NoneDepth 69.4%

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 4
Current: £163 GBP|Low: £140 GBP|High: £837 GBP|Avg: £386 GBP|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 6£140 GBP
Retailer 17£158 GBP
Retailer 1£163 GBP
Retailer 18£175 GBP
Retailer 10£177 GBP
Retailer 12£198 GBP
Retailer 16£236 GBP
Retailer 4£288 GBP
Retailer 8£302 GBP
Retailer 13£314 GBP
Retailer 9£416 GBP
Retailer 5£425 GBP
Retailer 11£472 GBP
Retailer 15£561 GBP
Retailer 3£563 GBP
Retailer 7£570 GBP
Retailer 2£586 GBP
Retailer 19£600 GBP
Retailer 14£813 GBP

19 data points across 19 retailers

21 retailers£140 GBP to £813 GBP

A
Cheapest Retailer
-
£140 GBP
A
Retailer 2
-
£158 GBP
View
Final sale: no returns
A
Retailer 3
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£163 GBP
View
A
Retailer 4
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£175 GBP
View
Retailer 5
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£177 GBP
View
Price last confirmed 12 days ago
A
Retailer 6
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£198 GBP
View
B+
Retailer 7
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£236 GBP
View
A
Retailer 8
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£288 GBP
View
A
Retailer 9
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£302 GBP
View
A
Retailer 10
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£314 GBP
View
A
Retailer 11
-
£416 GBP
View
A
Retailer 12
-
£425 GBP
View
B+
Retailer 13
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£472 GBP
View
B+
Retailer 14
-
£561 GBP
View
B+
Retailer 15
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£563 GBP
View
B+
Retailer 16
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£570 GBP
View
B+
Retailer 17
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£586 GBP
View
B+
Retailer 18
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£600 GBP
View
Retailer 19
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£799 GBP
View
Price last confirmed 19 days ago
B+
Retailer 20
-
£813 GBP
View
Most Expensive
Helzberg Diamonds
ZXZOKHMIPLLG · Oct 13
£1,328 GBP
$1,788 USD
View
Price last confirmed 23 days ago
20 more retailers have this diamond
Prices start from £140 GBPSave up to £672 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
1.28ct Radiant
£140 GBP