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Cushion|Lab Grown|IGI

1.28ct E VVS1 Cushion Lab Grown Diamond

ID • E/VVS1 • IGI LG794629181

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG794629181

Diamond specifications and retailer prices

From £309 GBP
$414 USD
As of October 29, 2026
Save £1,283 GBP (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,592 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 E colour (colourless) and VVS1 clarity (very-very-slightly-included), with a top-tier cut grade and certified by IGI LG794629181 or 794629181. Listed at 18 retailers as of October 27, 2026, with prices from £309 to £1,592, a £1,283 spread on the same certified stone. Queensmith lists it at £1,592. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
E
Colour
VVS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794629181
Dimensions7.20 × 6.36 × 3.62 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizeLarge
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
7.20 mm6.36 mm1.28 ctE / VVS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794629181
Side View
Table 59.0%Crown 32.5°Girdle: STK-THKPavilion 40.6°Culet: LargeDepth 56.9%

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: Oct 29
Current: £631 GBP|Low: £297 GBP|High: £1,426 GBP|Avg: £728 GBP|+2.7%
Retailer 1
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
October 31, 2026
Retailer 12£309 GBP
Retailer 8£346 GBP
Retailer 5£346 GBP
Retailer 3£384 GBP
Retailer 14£384 GBP
Retailer 10£493 GBP
Retailer 13£515 GBP
Retailer 1£631 GBP
Retailer 7£935 GBP
Retailer 11£1,075 GBP
Retailer 6£1,115 GBP
Retailer 4£1,219 GBP
Retailer 2£1,233 GBP
Retailer 9£1,416 GBP

44 data points across 14 retailers

18 retailers£309 GBP to £1,592 GBP

A
Cheapest Retailer
-
£309 GBP
$414 USD
A
Retailer 2
-
£346 GBP
$463 USD
View
Final sale: no returns
A
Retailer 3
-
£346 GBP
$464 USD
View
A
Retailer 4
-
£384 GBP
$514 USD
View
A
Retailer 5
-
£384 GBP
$514 USD
View
B+
Retailer 6
-
£493 GBP
$660 USD
View
B+
Retailer 7
-
£512 GBP
$686 USD
View
B+
Retailer 8
-
£515 GBP
$690 USD
View
B+
Retailer 9
-
£631 GBP
View
B
Retailer 10
-
£935 GBP
A$1,927 AUD
View
B
Retailer 11
-
£1,075 GBP
$1,441 USD
View
B
Retailer 12
-
£1,115 GBP
View
B
Retailer 13
-
£1,219 GBP
SGD 2,208 SGD
View
B
Retailer 14
-
£1,233 GBP
$1,652 USD
View
B
Retailer 15
-
£1,258 GBP
$1,686 USD
View
B
Retailer 16
-
£1,402 GBP
$1,878 USD
View
B
Retailer 17
-
£1,416 GBP
View
Most Expensive
B
Queensmith
LG794629181 · Oct 27
£1,592 GBP
View
17 more retailers have this diamond
Prices start from £309 GBPSave up to £1,283 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
£309 GBP