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Cushion|Lab Grown|IGI

1.22ct D IF Cushion Lab Grown Diamond

VG • D/IF • IGI LG840622278

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840622278

Diamond specifications and retailer prices

From £267 GBP
As of November 4, 2026
Save £1,210 GBP (82%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,477 GBP at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

About this 1.22ct lab-grown cushion diamond

This 1.22ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG840622278 or 840622278. Listed at 17 retailers as of November 4, 2026, with prices from £267 to £1,477, a £1,210 spread on the same certified stone. Helzberg Diamonds lists it at £1,477. 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

1.22
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.1°
Pavilion angle34.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840622278
Dimensions7.86 × 5.27 × 3.58 mm
L/W Ratio1.49
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
7.86 mm5.27 mm1.22 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840622278
Side View
Table 64.0%Crown 38.1°Girdle: MED-STKPavilion 34.1°Culet: NoneDepth 67.9%

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 4
Current: £1,477 GBP|Low: £267 GBP|High: £1,563 GBP|Avg: £741 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
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Retailer 11
Retailer 12
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Retailer 17
November 4, 2026
Retailer 7£267 GBP
Retailer 2£304 GBP
Retailer 16£411 GBP
Retailer 6£479 GBP
Retailer 15£479 GBP
Retailer 5£480 GBP
Retailer 14£510 GBP
Retailer 11£524 GBP
Retailer 4£597 GBP
Retailer 10£728 GBP
Retailer 13£740 GBP
Retailer 8£947 GBP
Retailer 9£986 GBP
Retailer 3£1,152 GBP
Retailer 12£1,188 GBP
Retailer 17£1,319 GBP
Helzberg Diamonds£1,477 GBP

20 data points across 17 retailers

17 retailers£267 GBP to £1,477 GBP

A
Cheapest Retailer
-
£267 GBP
Final sale: no returns
A
Retailer 2
-
£304 GBP
View
A
Retailer 3
-
£411 GBP
View
A
Retailer 4
-
£479 GBP
View
A
Retailer 5
-
£479 GBP
View
A
Retailer 6
-
£480 GBP
View
A
Retailer 7
-
£510 GBP
View
A
Retailer 8
-
£524 GBP
View
A
Retailer 9
-
£597 GBP
View
B+
Retailer 10
-
£728 GBP
View
B+
Retailer 11
-
£740 GBP
View
B+
Retailer 12
-
£947 GBP
View
B+
Retailer 13
-
£986 GBP
View
Retailer 14
-
£1,152 GBP
View
Price last confirmed 7 days ago
B
Retailer 15
-
£1,188 GBP
View
B
Retailer 16
-
£1,319 GBP
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMIIINO · Nov 4
£1,477 GBP
$1,994 USD
View
16 more retailers have this diamond
Prices start from £267 GBPSave up to £1,210 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
1.22ct Cushion
£267 GBP