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Radiant|Lab Grown|IGI

1.22ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG742529028

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG742529028

Diamond specifications and retailer prices

From £156 GBP
As of November 4, 2026
Save £1,341 GBP (90%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £1,703 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1.22ct lab-grown radiant diamond

This 1.22ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG742529028 or 742529028. Listed at 24 retailers as of November 4, 2026, with a 862% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.22
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle36.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG742529028
Dimensions7.87 × 5.45 × 3.59 mm
L/W Ratio1.44
Culet sizePointed
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
7.87 mm5.45 mm1.22 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG742529028
Side View
Table 63.0%Crown 39.7°Girdle: MediumPavilion 36.6°Culet: NoneDepth 65.9%

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: £219 GBP|Low: £150 GBP|High: £1,733 GBP|Avg: £608 GBP|-0.7%
Retailer 1
Retailer 2
Retailer 3
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Retailer 20
November 4, 2026
Retailer 2£156 GBP
Retailer 9£174 GBP
Retailer 19£181 GBP
Retailer 6£193 GBP
Retailer 10£193 GBP
Retailer 1£219 GBP
Retailer 16£276 GBP
Retailer 14£367 GBP
Retailer 4£373 GBP
Retailer 12£397 GBP
Retailer 18£519 GBP
Retailer 5£622 GBP
Retailer 3£684 GBP
Retailer 13£811 GBP
Retailer 11£839 GBP
Retailer 15£853 GBP
Retailer 8£907 GBP
Retailer 17£1,311 GBP
Retailer 20£1,359 GBP
Retailer 7£1,496 GBP

39 data points across 20 retailers

24 retailers£156 GBP to £1,496 GBP

A
Cheapest Retailer
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£156 GBP
A
Retailer 2
-
£174 GBP
View
Final sale: no returns
A
Retailer 3
-
£181 GBP
View
Retailer 4
-
£193 GBP
View
Price last confirmed 10 days ago
A
Retailer 5
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£193 GBP
View
A
Retailer 6
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£219 GBP
View
A
Retailer 7
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£276 GBP
View
A
Retailer 8
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£293 GBP
View
A
Retailer 9
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£367 GBP
View
A
Retailer 10
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£373 GBP
View
A
Retailer 11
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£397 GBP
View
A
Retailer 12
-
£445 GBP
View
Retailer 13
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£519 GBP
View
Price last confirmed 8 days ago
B+
Retailer 14
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£622 GBP
View
B+
Retailer 15
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£684 GBP
View
B+
Retailer 16
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£811 GBP
View
B+
Retailer 17
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£835 GBP
View
B+
Retailer 18
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£839 GBP
View
B+
Retailer 19
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£853 GBP
View
B
Retailer 20
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£907 GBP
View
B
Retailer 21
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£1,311 GBP
View
Retailer 22
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£1,359 GBP
View
Price last confirmed 17 days ago
B
Retailer 23
-
£1,496 GBP
View
Most Expensive
Queensmith
LG742529028 · Oct 27
£1,703 GBP
View
Price last confirmed 8 days ago
23 more retailers have this diamond
Prices start from £156 GBPSave up to £1,341 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 Radiant
£156 GBP