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Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG735580809

Shape and cutting style on the report: Cut cornered rectangular mixed cut

Certificate IGI LG735580809

Diamond specifications and retailer prices

From $419 AUD
As of November 4, 2026
Save $1,708 AUD (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $2,743 AUD at Rare Carat · As of September 28, 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 LG735580809 or 735580809. Listed at 20 retailers as of November 4, 2026, with a 408% 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle25.5°
Pavilion angle33.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG735580809
Dimensions7.65 × 4.90 × 3.18 mm
L/W Ratio1.56
Culet sizeLong
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.65 mm4.90 mm1.21 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG735580809
Side View
Table 60.0%Crown 25.5°Girdle: MED-STKPavilion 33.4°Culet: LNGDepth 64.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $2,743 AUD|Low: $401 AUD|High: $2,743 AUD|Avg: $1,073 AUD
Rare Carat
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
November 6, 2026
Retailer 15$419 AUD
Retailer 7$469 AUD
Retailer 5$486 AUD
Retailer 3$519 AUD
Retailer 6$519 AUD
Retailer 14$721 AUD
Retailer 13$743 AUD
Retailer 11$836 AUD
Retailer 10$894 AUD
Retailer 2$909 AUD
Retailer 9$1,391 AUD
Retailer 4$1,667 AUD
Retailer 12$1,736 AUD
Retailer 8$2,073 AUD
Rare Carat$2,743 AUD

46 data points across 15 retailers

20 retailers$419 AUD to $2,127 AUD

A
Cheapest Retailer
-
$419 AUD
A
Retailer 2
-
$469 AUD
View
Final sale: no returns
A
Retailer 3
-
$486 AUD
View
Retailer 4
-
$519 AUD
View
Price last confirmed 12 days ago
A
Retailer 5
-
$519 AUD
View
A
Retailer 6
-
$721 AUD
View
A
Retailer 7
-
$743 AUD
View
A
Retailer 8
-
$836 AUD
View
A
Retailer 9
-
$894 AUD
View
A
Retailer 10
-
$894 AUD
View
A
Retailer 11
-
$909 AUD
View
B+
Retailer 12
-
$1,391 AUD
View
B
Retailer 13
-
$1,667 AUD
View
Retailer 14
-
$1,736 AUD
View
Price last confirmed 7 days ago
B
Retailer 15
-
$1,736 AUD
View
B
Retailer 16
-
$1,913 AUD
View
B
Retailer 17
-
$2,024 AUD
View
B
Retailer 18
-
$2,073 AUD
View
B
Retailer 19
-
$2,127 AUD
View
Most Expensive
Rare Carat
91965A_l_735580809 · Sep 28
$2,743 AUD
$1,920 USD
View
Price last confirmed 39 days ago
19 more retailers have this diamond
Prices start from $419 AUDSave up to $1,708 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
$419 AUD