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Cushion|Lab Grown|IGI

1.66ct E IF Cushion Lab Grown Diamond

VG • E/IF • IGI LG737526142

Certificate IGI LG737526142

Diamond specifications and retailer prices

From £2,336 GBP
$3,130 USD
As of October 30, 2026
Save £470 GBP (17%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £2,806 GBP at Kay Jewelers · As of November 2, 2026
View at Kay Jewelers

About this 1.66ct lab-grown cushion diamond

This 1.66ct lab-grown cushion sits in the one-and-a-half to two carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG737526142 or 737526142. Listed at 3 retailers as of October 30, 2026, with prices from £2,336 to £2,806, a £470 spread on the same certified stone. Kay Jewelers lists it at £2,806. 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

1.66
Carat
E
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG737526142
Dimensions8.39 × 6.30 mm
L/W Ratio1.33
Top View
8.39 mm6.30 mm1.66 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG737526142
Side View
Table 67.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 67.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 30
Current: £2,806 GBP|Low: £2,336 GBP|High: £3,038 GBP|Avg: £2,783 GBP|-7.6%
Kay Jewelers
Retailer 2
Retailer 3
May 28, 2026
Retailer 3£2,336 GBP
Kay Jewelers£2,806 GBP
Retailer 2£2,806 GBP

6 data points across 3 retailers

3 retailers£2,336 GBP to £2,806 GBP

B
Cheapest Retailer
-
£2,336 GBP
$3,130 USD
B
Retailer 2
-
£2,806 GBP
$3,760 USD
View
Most Expensive
B
Kay Jewelers
256488952 · Nov 2
£2,806 GBP
$3,760 USD
View
2 more retailers have this diamond
Prices start from £2,336 GBPSave up to £470 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
1.66ct Cushion
£2,336 GBP