Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG758550096

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

Certificate IGI LG758550096

Diamond specifications and retailer prices

From €331 EUR
$370 USD
As of October 30, 2026
Save €1,244 EUR (79%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €1,642 EUR at Rare Carat · As of October 18, 2026
View at Rare Carat

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 LG758550096 or 758550096. Listed at 9 retailers as of October 30, 2026, with a 376% 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

1.21
Carat
D
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.8°
Pavilion angle35.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG758550096
Dimensions7.78 × 5.36 × 3.54 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
7.78 mm5.36 mm1.21 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG758550096
Side View
Table 62.0%Crown 39.8°Girdle: MediumPavilion 35.8°Culet: NoneDepth 66.0%

Caratlytics Score

How it works →
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: €1,642 EUR|Low: €331 EUR|High: €2,139 EUR|Avg: €861 EUR|-1.6%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 3€331 EUR
Retailer 7€344 EUR
Retailer 6€449 EUR
Retailer 2€474 EUR
Retailer 9€530 EUR
Retailer 8€975 EUR
Retailer 5€1,029 EUR
Retailer 4€1,575 EUR
Rare Carat€1,642 EUR

42 data points across 9 retailers

9 retailers€331 EUR to €1,575 EUR

A
Cheapest Retailer
-
€331 EUR
$370 USD
A
Retailer 2
-
€344 EUR
HK$3,000 HKD
View
A
Retailer 3
-
€449 EUR
$502 USD
View
A
Retailer 4
-
€474 EUR
£417 GBP
View
A
Retailer 5
-
€530 EUR
$592 USD
View
B+
Retailer 6
-
€975 EUR
$1,089 USD
View
B+
Retailer 7
-
€1,029 EUR
£905 GBP
View
B
Retailer 8
-
€1,575 EUR
$1,760 USD
View
Most Expensive
Rare Carat
BJ-107A · Oct 18
€1,642 EUR
$1,835 USD
View
Price last confirmed 14 days ago
8 more retailers have this diamond
Prices start from €331 EURSave up to €1,244 EUR

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
€331 EUR