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Cushion|Lab Grown|IGI

1.27ct F IF Cushion Lab Grown Diamond

VG • F/IF • IGI LG833665771

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG833665771

Diamond specifications and retailer prices

From £285 GBP
As of November 6, 2026
Save £1,344 GBP (83%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,629 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.27ct lab-grown cushion diamond

This 1.27ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG833665771 or 833665771. Listed at 17 retailers as of November 6, 2026, with prices from £285 to £1,629, a £1,344 spread on the same certified stone. Brilliant Earth lists it at £1,629. 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

1.27
Carat
F
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG833665771
Dimensions6.27 × 6.17 × 4.19 mm
L/W Ratio1.02
Girdle conditionFaceted
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
6.27 mm6.17 mm1.27 ctF / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG833665771
Side View
Table 63.0%Crown 35.5°Girdle: STK-THKPavilion 40°Culet: NoneDepth 67.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £1,629 GBP|Low: £258 GBP|High: £1,629 GBP|Avg: £608 GBP
Brilliant Earth
Retailer 2
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Retailer 11
Retailer 12
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Retailer 17
November 6, 2026
Retailer 9£258 GBP
Retailer 10£285 GBP
Retailer 5£299 GBP
Retailer 13£418 GBP
Retailer 2£432 GBP
Retailer 4£445 GBP
Retailer 16£468 GBP
Retailer 11£475 GBP
Retailer 15£663 GBP
Retailer 3£669 GBP
Retailer 14£721 GBP
Retailer 8£811 GBP
Retailer 7£908 GBP
Retailer 17£990 GBP
Retailer 12£1,084 GBP
Retailer 6£1,112 GBP
Brilliant Earth£1,629 GBP

30 data points across 17 retailers

17 retailers£285 GBP to £1,629 GBP

Retailer 1
-
£258 GBP
Price last confirmed 13 days ago
A
Retailer 2
-
£285 GBP
View
A
Retailer 3
-
£299 GBP
View
Final sale: no returns
A
Retailer 4
-
£418 GBP
View
A
Retailer 5
-
£432 GBP
View
A
Retailer 6
-
£445 GBP
View
A
Retailer 7
-
£468 GBP
View
A
Retailer 8
-
£475 GBP
View
A
Retailer 9
-
£663 GBP
View
A
Retailer 10
-
£669 GBP
View
B+
Retailer 11
-
£721 GBP
View
Retailer 12
-
£811 GBP
View
Price last confirmed 9 days ago
B+
Retailer 13
-
£908 GBP
View
B+
Retailer 14
-
£990 GBP
View
B+
Retailer 15
-
£1,084 GBP
View
B+
Retailer 16
-
£1,112 GBP
View
Most Expensive
B
Brilliant Earth
22475983A · Nov 6
£1,629 GBP
$2,180 USD
View
16 more retailers have this diamond
Prices start from £285 GBPSave up to £1,344 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
1.27ct Cushion
£285 GBP