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Cushion|Lab Grown|IGI

1.28ct D VVS1 Cushion Lab Grown Diamond

ID • D/VVS1 • IGI LG794629267

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG794629267

Diamond specifications and retailer prices

From £307 GBP
As of November 4, 2026
Save £1,091 GBP (78%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,618 GBP at Queensmith · As of October 27, 2026
View at Queensmith

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 LG794629267 or 794629267. Listed at 19 retailers as of November 3, 2026, with a 356% 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 angle36.7°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794629267
Dimensions6.95 × 6.15 × 3.73 mm
L/W Ratio1.13
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
6.95 mm6.15 mm1.28 ctD / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794629267
Side View
Table 62.0%Crown 36.7°Girdle: THK-VTKPavilion 41.2°Culet: NoneDepth 60.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £433 GBP|Low: £295 GBP|High: £1,415 GBP|Avg: £629 GBP|-1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 4, 2026
Retailer 10£307 GBP
Retailer 7£343 GBP
Retailer 2£381 GBP
Retailer 3£381 GBP
Retailer 1£433 GBP
Retailer 8£489 GBP
Retailer 11£511 GBP
Retailer 4£620 GBP
Retailer 6£927 GBP
Retailer 9£1,067 GBP
Retailer 5£1,398 GBP

40 data points across 11 retailers

19 retailers£307 GBP to £1,398 GBP

A
Cheapest Retailer
-
£307 GBP
A
Retailer 2
-
£343 GBP
View
Final sale: no returns
A
Retailer 3
-
£344 GBP
View
Retailer 4
-
£381 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
-
£381 GBP
View
A
Retailer 6
-
£433 GBP
View
A
Retailer 7
-
£489 GBP
View
B+
Retailer 8
-
£511 GBP
View
B+
Retailer 9
-
£528 GBP
View
B+
Retailer 10
-
£620 GBP
View
B
Retailer 11
-
£927 GBP
View
B
Retailer 12
-
£1,067 GBP
View
B
Retailer 13
-
£1,106 GBP
View
B
Retailer 14
-
£1,210 GBP
View
B
Retailer 15
-
£1,224 GBP
View
B
Retailer 16
-
£1,249 GBP
View
B
Retailer 17
-
£1,390 GBP
View
B
Retailer 18
-
£1,398 GBP
View
Most Expensive
Queensmith
LG794629267 · Oct 27
£1,618 GBP
View
Price last confirmed 8 days ago
18 more retailers have this diamond
Prices start from £307 GBPSave up to £1,091 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
£307 GBP