Radiant|Lab Grown|IGI

1.21ct E IF Radiant Lab Grown Diamond

ID • E/IF • IGI LG625448755

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

Certificate IGI LG625448755

Diamond specifications and retailer prices

From £148 GBP
$198 USD
As of October 30, 2026
Save £1,270 GBP (90%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: £1,418 GBP at Do Amore Diamonds · As of October 31, 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 E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG625448755 or 625448755. Listed at 28 retailers as of October 30, 2026, with prices from £148 to £1,418, a £1,270 spread on the same certified stone. Do Amore Diamonds lists it at £1,418. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.21
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle28.5°
Pavilion angle32.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG625448755
Dimensions7.79 × 5.29 × 3.50 mm
L/W Ratio1.47
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
7.79 mm5.29 mm1.21 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG625448755
Side View
Table 62.0%Crown 28.5°Girdle: MediumPavilion 32.6°Culet: NoneDepth 66.2%

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: Oct 30
Current: £809 GBP|Low: £148 GBP|High: £1,411 GBP|Avg: £496 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 1, 2026
Retailer 16£148 GBP
Retailer 15£169 GBP
Retailer 2£285 GBP
Retailer 4£287 GBP
Retailer 10£340 GBP
Retailer 12£347 GBP
Retailer 6£366 GBP
Retailer 9£375 GBP
Retailer 8£437 GBP
Retailer 7£450 GBP
Retailer 13£494 GBP
Retailer 14£590 GBP
Retailer 11£779 GBP
Retailer 1£809 GBP
Retailer 5£837 GBP
Retailer 3£1,411 GBP

45 data points across 16 retailers

28 retailers£148 GBP to £1,418 GBP

A
Cheapest Retailer
-
£148 GBP
$198 USD
Retailer 2
-
£148 GBP
$198 USD
View
Price last confirmed 24 days ago
Retailer 3
-
£148 GBP
$198 USD
View
Price last confirmed 32 days ago
A
Retailer 4
-
£169 GBP
$226 USD
View
Final sale: no returns
Retailer 5
-
£171 GBP
$229 USD
View
Price last confirmed 34 days ago
Retailer 6
-
£181 GBP
$242 USD
View
Price last confirmed 33 days ago
Retailer 7
-
£183 GBP
$245 USD
View
Price last confirmed 29 days ago
A
Retailer 8
-
£285 GBP
$382 USD
View
A
Retailer 9
-
£287 GBP
HK$3,000 HKD
View
A
Retailer 10
-
£340 GBP
€434 EUR
View
A
Retailer 11
-
£347 GBP
ZAR 7,511 ZAR
View
A
Retailer 12
-
£366 GBP
$490 USD
View
A
Retailer 13
-
£375 GBP
View
A
Retailer 14
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£437 GBP
$586 USD
View
A
Retailer 15
-
£450 GBP
$603 USD
View
A
Retailer 16
-
£494 GBP
A$1,018 AUD
View
B+
Retailer 17
-
£590 GBP
$791 USD
View
B+
Retailer 18
-
£649 GBP
$870 USD
View
Retailer 19
-
£649 GBP
$870 USD
View
Price last confirmed 21 days ago
Retailer 20
-
£649 GBP
$870 USD
View
Price last confirmed 31 days ago
B+
Retailer 21
-
£778 GBP
$1,042 USD
View
B+
Retailer 22
-
£779 GBP
A$1,606 AUD
View
B+
Retailer 23
-
£809 GBP
View
B+
Retailer 24
-
£837 GBP
SGD 1,516 SGD
View
B+
Retailer 25
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£886 GBP
$1,187 USD
View
Retailer 26
-
£1,081 GBP
$1,449 USD
View
Price last confirmed 56 days ago
B
Retailer 27
-
£1,411 GBP
$1,890 USD
View
Most Expensive
B
Do Amore Diamonds
27-CB45E29D4 · Oct 31
£1,418 GBP
$1,900 USD
View
27 more retailers have this diamond
Prices start from £148 GBPSave up to £1,270 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
£148 GBP