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Cushion|Lab Grown|IGI

1.28ct D VVS1 Cushion Lab Grown Diamond

ID • D/VVS1 • IGI LG831687239

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG831687239

Diamond specifications and retailer prices

From £177 GBP
As of November 4, 2026
Save £1,147 GBP (87%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,324 GBP at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

About this 1.28ct lab-grown cushion diamond

This 1.28ct lab-grown cushion 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 LG831687239 or 831687239. Listed at 16 retailers as of November 4, 2026, with prices from £177 to £1,324, a £1,147 spread on the same certified stone. Helzberg Diamonds lists it at £1,324. 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 angle34.8°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831687239
Dimensions7.72 × 5.53 × 3.71 mm
L/W Ratio1.40
Girdle conditionFaceted
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
7.72 mm5.53 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831687239
Side View
Table 60.0%Crown 34.8°Girdle: STK-THKPavilion 35.2°Culet: NoneDepth 67.1%

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: £1,324 GBP|Low: £169 GBP|High: £1,324 GBP|Avg: £553 GBP
Helzberg Diamonds
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
November 5, 2026
Retailer 3£177 GBP
Retailer 9£223 GBP
Retailer 14£333 GBP
Retailer 4£337 GBP
Retailer 12£339 GBP
Retailer 2£359 GBP
Retailer 15£378 GBP
Retailer 5£476 GBP
Retailer 10£479 GBP
Retailer 11£514 GBP
Retailer 6£641 GBP
Retailer 8£670 GBP
Retailer 16£744 GBP
Retailer 13£786 GBP
Retailer 7£970 GBP
Helzberg Diamonds£1,324 GBP

14 data points across 16 retailers

16 retailers£177 GBP to £1,324 GBP

A
Cheapest Retailer
-
£177 GBP
Final sale: no returns
A
Retailer 2
-
£223 GBP
View
A
Retailer 3
-
£333 GBP
View
A
Retailer 4
-
£337 GBP
View
A
Retailer 5
-
£339 GBP
View
A
Retailer 6
-
£359 GBP
View
A
Retailer 7
-
£378 GBP
View
A
Retailer 8
-
£476 GBP
View
A
Retailer 9
-
£479 GBP
View
B+
Retailer 10
-
£514 GBP
View
B+
Retailer 11
-
£641 GBP
View
B+
Retailer 12
-
£670 GBP
View
Retailer 13
-
£744 GBP
View
Price last confirmed 8 days ago
B+
Retailer 14
-
£786 GBP
View
B
Retailer 15
-
£970 GBP
View
Most Expensive
B
Helzberg Diamonds
ZXZOJHMONIJP · Nov 4
£1,324 GBP
$1,788 USD
View
15 more retailers have this diamond
Prices start from £177 GBPSave up to £1,147 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 Cushion
£177 GBP