Radiant|Lab Grown|IGI

1.21ct E IF Radiant Lab Grown Diamond

EX • E/IF • IGI LG651411202

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

Certificate IGI LG651411202

Diamond specifications and retailer prices

From £149 GBP
$200 USD
As of October 30, 2026
Save £1,519 GBP (91%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £1,668 GBP at Queensmith · As of October 27, 2026
View at Queensmith

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 LG651411202 or 651411202. Listed at 25 retailers as of October 27, 2026, with prices from £149 to £1,668, a £1,519 spread on the same certified stone. Queensmith lists it at £1,668. 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
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.1°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG651411202
Dimensions7.90 × 5.43 × 3.49 mm
L/W Ratio1.45
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
7.90 mm5.43 mm1.21 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG651411202
Side View
Table 62.0%Crown 38.1°Girdle: MediumPavilion 35.5°Culet: NoneDepth 64.3%

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: £381 GBP|Low: £149 GBP|High: £1,433 GBP|Avg: £543 GBP|-5.4%
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November 1, 2026
Retailer 23£149 GBP
Retailer 10£167 GBP
Retailer 20£174 GBP
Retailer 5£186 GBP
Retailer 11£186 GBP
Retailer 12£217 GBP
Retailer 8£264 GBP
Retailer 14£287 GBP
Retailer 18£352 GBP
Retailer 3£368 GBP
Retailer 1£381 GBP
Retailer 22£451 GBP
Retailer 19£501 GBP
Retailer 4£599 GBP
Retailer 2£658 GBP
Retailer 15£786 GBP
Retailer 9£796 GBP
Retailer 13£816 GBP
Retailer 17£825 GBP
Retailer 7£892 GBP
Retailer 21£1,090 GBP
Retailer 16£1,411 GBP
Retailer 6£1,433 GBP

38 data points across 23 retailers

25 retailers£149 GBP to £1,668 GBP

A
Cheapest Retailer
-
£149 GBP
$200 USD
A
Retailer 2
-
£167 GBP
$224 USD
View
Final sale: no returns
A
Retailer 3
-
£174 GBP
$233 USD
View
A
Retailer 4
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£186 GBP
$249 USD
View
A
Retailer 5
-
£186 GBP
$249 USD
View
A
Retailer 6
-
£217 GBP
View
B+
Retailer 7
-
£264 GBP
$354 USD
View
A
Retailer 8
-
£287 GBP
HK$3,000 HKD
View
A
Retailer 9
-
£352 GBP
ZAR 7,614 ZAR
View
A
Retailer 10
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£368 GBP
$493 USD
View
A
Retailer 11
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£381 GBP
View
A
Retailer 12
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£451 GBP
$604 USD
View
A
Retailer 13
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£501 GBP
A$1,032 AUD
View
B+
Retailer 14
-
£599 GBP
$802 USD
View
B+
Retailer 15
-
£658 GBP
$882 USD
View
B+
Retailer 16
-
£786 GBP
$1,054 USD
View
B+
Retailer 17
-
£796 GBP
View
B+
Retailer 18
-
£816 GBP
SGD 1,477 SGD
View
B+
Retailer 19
-
£825 GBP
View
B
Retailer 20
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£892 GBP
$1,195 USD
View
Retailer 21
-
£1,090 GBP
$1,460 USD
View
Price last confirmed 10 days ago
Retailer 22
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£1,097 GBP
$1,470 USD
View
Price last confirmed 17 days ago
B
Retailer 23
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£1,411 GBP
$1,890 USD
View
B
Retailer 24
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£1,433 GBP
$1,920 USD
View
Most Expensive
B
Queensmith
LG651411202 · Oct 27
£1,668 GBP
View
24 more retailers have this diamond
Prices start from £149 GBPSave up to £1,519 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
£149 GBP