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Cushion|Lab Grown|IGI

1.26ct G SI1 Cushion Lab Grown Diamond

VG • G/SI1 • IGI LG605313858

Certificate IGI LG605313858

Diamond specifications and retailer prices

From £439 GBP
As of November 6, 2026
Save £174 GBP (28%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £613 GBP at Kay Jewelers · As of November 5, 2026
View at Kay Jewelers

About this 1.26ct lab-grown cushion diamond

This 1.26ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG605313858 or 605313858. Listed at 4 retailers as of November 5, 2026, with prices from £439 to £613, a £174 spread on the same certified stone. Kay Jewelers lists it at £613. 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

1.26
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG605313858
Dimensions7.38 × 6.04 × 3.92 mm
L/W Ratio1.22
Top View
7.38 mm6.04 mm1.26 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG605313858
Side View
Table 58.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 64.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £613 GBP|Low: £439 GBP|High: £934 GBP|Avg: £624 GBP
Kay Jewelers
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 2£439 GBP
Retailer 3£439 GBP
Kay Jewelers£613 GBP
Retailer 4£613 GBP

3 data points across 4 retailers

4 retailers£439 GBP to £613 GBP

B+
Cheapest Retailer
-
£439 GBP
B+
Retailer 2
-
£439 GBP
View
B
Retailer 3
-
£613 GBP
View
Most Expensive
B
Kay Jewelers
249426876 · Nov 5
£613 GBP
$820 USD
View
3 more retailers have this diamond
Prices start from £439 GBPSave up to £174 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.

B+
1.26ct Cushion
£439 GBP