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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 $473 SGD
$370 USD
As of October 30, 2026
Save $1,777 SGD (79%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,346 SGD 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
Colour
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: $2,346 SGD|Low: $473 SGD|High: $3,055 SGD|Avg: $1,228 SGD|-1.6%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2$473 SGD
Retailer 7$491 SGD
Retailer 6$642 SGD
Retailer 4$687 SGD
Retailer 9$757 SGD
Retailer 8$1,392 SGD
Retailer 5$1,469 SGD
Retailer 3$2,250 SGD
Rare Carat$2,346 SGD

43 data points across 9 retailers

9 retailers$473 SGD to $2,250 SGD

A
Cheapest Retailer
-
$473 SGD
$370 USD
A
Retailer 2
-
$491 SGD
HK$3,000 HKD
View
A
Retailer 3
-
$642 SGD
$502 USD
View
A
Retailer 4
-
$687 SGD
£423 GBP
View
A
Retailer 5
-
$757 SGD
$592 USD
View
B+
Retailer 6
-
$1,392 SGD
$1,089 USD
View
B+
Retailer 7
-
$1,469 SGD
£905 GBP
View
B
Retailer 8
-
$2,250 SGD
$1,760 USD
View
Most Expensive
Rare Carat
BJ-107A · Oct 18
$2,346 SGD
$1,835 USD
View
Price last confirmed 12 days ago
8 more retailers have this diamond
Prices start from $473 SGDSave up to $1,777 SGD

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
$473 SGD