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Radiant|Lab Grown|IGI

1.28ct D VVS1 Radiant Lab Grown Diamond

ID • D/VVS1 • IGI LG828688726

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

Certificate IGI LG828688726

Diamond specifications and retailer prices

From £162 GBP
As of November 4, 2026
Save £1,161 GBP (88%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,323 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

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 LG828688726 or 828688726. Listed at 18 retailers as of November 4, 2026, with prices from £162 to £1,323, a £1,161 spread on the same certified stone. Brilliant Earth lists it at £1,323. 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 angle47°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828688726
Dimensions7.54 × 5.37 × 3.58 mm
L/W Ratio1.40
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.54 mm5.37 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828688726
Side View
Table 65.0%Crown 47°Girdle: STK-THKPavilion 35.5°Culet: NoneDepth 66.7%

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: £1,323 GBP|Low: £162 GBP|High: £1,479 GBP|Avg: £535 GBP|-10.6%
Brilliant Earth
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 6, 2026
Retailer 14£162 GBP
Retailer 2£166 GBP
Retailer 11£201 GBP
Retailer 15£241 GBP
Retailer 5£310 GBP
Retailer 13£323 GBP
Retailer 3£329 GBP
Retailer 8£420 GBP
Retailer 4£438 GBP
Retailer 7£473 GBP
Retailer 16£577 GBP
Retailer 12£579 GBP
Retailer 10£600 GBP
Retailer 17£614 GBP
Retailer 9£799 GBP
Retailer 6£840 GBP
Brilliant Earth£1,323 GBP

24 data points across 17 retailers

18 retailers£162 GBP to £1,323 GBP

A
Cheapest Retailer
-
£162 GBP
Final sale: no returns
A
Retailer 2
-
£166 GBP
View
A
Retailer 3
-
£201 GBP
View
B+
Retailer 4
-
£241 GBP
View
A
Retailer 5
-
£310 GBP
View
A
Retailer 6
-
£323 GBP
View
A
Retailer 7
-
£329 GBP
View
A
Retailer 8
-
£420 GBP
View
B+
Retailer 9
-
£438 GBP
View
B+
Retailer 10
-
£473 GBP
View
B+
Retailer 11
-
£577 GBP
View
B+
Retailer 12
-
£579 GBP
View
B+
Retailer 13
-
£600 GBP
View
B+
Retailer 14
-
£614 GBP
View
Retailer 15
-
£722 GBP
View
Price last confirmed 29 days ago
Retailer 16
-
£799 GBP
View
Price last confirmed 19 days ago
B+
Retailer 17
-
£840 GBP
View
Most Expensive
B
Brilliant Earth
21325021A · Nov 4
£1,323 GBP
$1,780 USD
View
17 more retailers have this diamond
Prices start from £162 GBPSave up to £1,161 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
£162 GBP