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Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG660492735

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

Certificate IGI LG660492735

Diamond specifications and retailer prices

From £157 GBP
As of November 4, 2026
Save £1,347 GBP (90%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: £1,504 GBP at Do Amore Diamonds · As of November 4, 2026
View at Do Amore Diamonds

About this 1.21ct lab-grown radiant diamond

This 1.21ct 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 LG660492735 or 660492735. Listed at 26 retailers as of November 4, 2026, with prices from £157 to £1,504, a £1,347 spread on the same certified stone. Do Amore Diamonds lists it at £1,504. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.4°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG660492735
Dimensions7.69 × 5.26 × 3.42 mm
L/W Ratio1.46
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
7.69 mm5.26 mm1.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660492735
Side View
Table 64.0%Crown 43.4°Girdle: MED-STKPavilion 33.7°Culet: NoneDepth 65.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £401 GBP|Low: £157 GBP|High: £1,719 GBP|Avg: £612 GBP|+3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
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Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
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Retailer 15
November 4, 2026
Retailer 2£157 GBP
Retailer 15£181 GBP
Retailer 4£304 GBP
Retailer 11£360 GBP
Retailer 9£370 GBP
Retailer 6£374 GBP
Retailer 1£401 GBP
Retailer 7£439 GBP
Retailer 8£525 GBP
Retailer 14£627 GBP
Retailer 10£859 GBP
Retailer 5£879 GBP
Retailer 3£884 GBP
Retailer 12£1,304 GBP
Retailer 13£1,367 GBP

45 data points across 15 retailers

26 retailers£157 GBP to £1,504 GBP

A
Cheapest Retailer
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£157 GBP
A
Retailer 2
-
£181 GBP
View
Final sale: no returns
Retailer 3
-
£182 GBP
View
Price last confirmed 38 days ago
Retailer 4
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£192 GBP
View
Price last confirmed 36 days ago
Retailer 5
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£194 GBP
View
Price last confirmed 32 days ago
A
Retailer 6
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£303 GBP
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A
Retailer 7
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£304 GBP
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A
Retailer 8
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£360 GBP
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A
Retailer 9
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£370 GBP
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A
Retailer 10
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£374 GBP
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A
Retailer 11
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£401 GBP
View
A
Retailer 12
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£439 GBP
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A
Retailer 13
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£469 GBP
View
A
Retailer 14
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£525 GBP
View
B+
Retailer 15
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£627 GBP
View
B+
Retailer 16
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£690 GBP
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Retailer 17
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£690 GBP
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Price last confirmed 25 days ago
Retailer 18
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£690 GBP
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Price last confirmed 35 days ago
B+
Retailer 19
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£816 GBP
View
B+
Retailer 20
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£859 GBP
View
B+
Retailer 21
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£879 GBP
View
Retailer 22
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£884 GBP
View
Price last confirmed 27 days ago
B
Retailer 23
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£911 GBP
View
B
Retailer 24
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£1,304 GBP
View
Retailer 25
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£1,367 GBP
View
Price last confirmed 17 days ago
Most Expensive
B
Do Amore Diamonds
27-80DE62B69 · Nov 4
£1,504 GBP
$2,030 USD
View
25 more retailers have this diamond
Prices start from £157 GBPSave up to £1,347 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
1.21ct Radiant
£157 GBP