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Cushion|Lab Grown|IGI

1.28ct F VS1 Cushion Lab Grown Diamond

VG • F/VS1 • IGI LG582349421

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG582349421

Diamond specifications and retailer prices

From £185 GBP
$248 USD
As of November 1, 2026
Save £1,405 GBP (88%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,590 GBP at Do Amore Diamonds · As of November 2, 2026
View at Do Amore 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 F colour (colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG582349421 or 582349421. Listed at 10 retailers as of November 1, 2026, with prices from £185 to £1,590, a £1,405 spread on the same certified stone. Do Amore Diamonds lists it at £1,590. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.28
Carat
F
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG582349421
Dimensions7.32 × 5.80 × 3.90 mm
L/W Ratio1.26
Girdle conditionFaceted
Culet sizeNone
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
7.32 mm5.80 mm1.28 ctF / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG582349421
Side View
Table 66.0%Crown 34.5°Girdle: MED-VTKPavilion 37.3°Culet: NoneDepth 67.2%

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 1
Current: £1,590 GBP|Low: £185 GBP|High: £1,590 GBP|Avg: £633 GBP
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 8£185 GBP
Retailer 4£272 GBP
Retailer 7£284 GBP
Retailer 5£349 GBP
Retailer 2£426 GBP
Retailer 10£545 GBP
Retailer 9£855 GBP
Retailer 3£912 GBP
Retailer 6£941 GBP
Do Amore Diamonds£1,590 GBP

25 data points across 10 retailers

10 retailers£185 GBP to £1,590 GBP

A
Cheapest Retailer
-
£185 GBP
$248 USD
Final sale: no returns
Retailer 2
-
£272 GBP
View
Price last confirmed 16 days ago
A
Retailer 3
-
£284 GBP
$380 USD
View
B+
Retailer 4
-
£349 GBP
$468 USD
View
B+
Retailer 5
-
£426 GBP
View
Retailer 6
-
£545 GBP
$730 USD
View
Price last confirmed 28 days ago
B
Retailer 7
-
£855 GBP
$1,145 USD
View
B
Retailer 8
-
£912 GBP
View
B
Retailer 9
-
£941 GBP
$1,261 USD
View
Most Expensive
B
Do Amore Diamonds
27-440414063 · Nov 2
£1,590 GBP
$2,130 USD
View
9 more retailers have this diamond
Prices start from £185 GBPSave up to £1,405 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
£185 GBP