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Cushion|Lab Grown|IGI

1.42ct F SI1 Cushion Lab Grown Diamond

VG • F/SI1 • IGI LG605314531

Certificate IGI LG605314531

Diamond specifications and retailer prices

From £608 GBP
As of November 6, 2026
Save £229 GBP (27%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £837 GBP at Zales · As of November 6, 2026
View at Zales

About this 1.42ct lab-grown cushion diamond

This 1.42ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG605314531 or 605314531. Listed at 4 retailers as of November 6, 2026, with prices from £608 to £837, a £229 spread on the same certified stone. Zales lists it at £837. 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

1.42
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG605314531
Dimensions7.64 × 6.19 × 4.00 mm
L/W Ratio1.23
Top View
7.64 mm6.19 mm1.42 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG605314531
Side View
Table 61.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 64.6%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £608 GBP|Low: £608 GBP|High: £971 GBP|Avg: £799 GBP|-37.4%
Retailer 1
Retailer 2
Retailer 3
Zales
November 6, 2026
Retailer 1£608 GBP
Retailer 2£608 GBP
Retailer 3£837 GBP
Zales£837 GBP

3 data points across 4 retailers

4 retailers£608 GBP to £837 GBP

B+
Cheapest Retailer
-
£608 GBP
B+
Retailer 2
-
£608 GBP
View
B
Retailer 3
-
£837 GBP
View
Most Expensive
B
Zales
518824648 · Nov 6
£837 GBP
$1,120 USD
View
3 more retailers have this diamond
Prices start from £608 GBPSave up to £229 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+
1.42ct Cushion
£608 GBP