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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 $529 AUD
As of November 4, 2026
Save $1,986 AUD (79%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $2,621 AUD 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 November 4, 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: Nov 4
Current: $2,621 AUD|Low: $529 AUD|High: $3,414 AUD|Avg: $1,369 AUD|-1.6%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4$529 AUD
Retailer 7$549 AUD
Retailer 6$717 AUD
Retailer 2$754 AUD
Retailer 9$846 AUD
Retailer 8$1,556 AUD
Retailer 3$1,628 AUD
Retailer 5$2,514 AUD
Rare Carat$2,621 AUD

44 data points across 9 retailers

9 retailers$529 AUD to $2,514 AUD

A
Cheapest Retailer
-
$529 AUD
A
Retailer 2
-
$549 AUD
View
A
Retailer 3
-
$717 AUD
View
A
Retailer 4
-
$754 AUD
View
A
Retailer 5
-
$846 AUD
View
B+
Retailer 6
-
$1,556 AUD
View
B+
Retailer 7
-
$1,628 AUD
View
B
Retailer 8
-
$2,514 AUD
View
Most Expensive
Rare Carat
BJ-107A · Oct 18
$2,621 AUD
$1,835 USD
View
Price last confirmed 18 days ago
8 more retailers have this diamond
Prices start from $529 AUDSave up to $1,986 AUD

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
$529 AUD