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Radiant|Lab Grown|IGI

1.56ct F IF Radiant Lab Grown Diamond

ID • F/IF • IGI LG620429386

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

Certificate IGI LG620429386

Diamond specifications and retailer prices

From $386 AUD
As of November 4, 2026
Save $3,206 AUD (89%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $4,034 AUD at Brilliant Earth · As of October 21, 2026
View at Brilliant Earth

About this 1.56ct lab-grown radiant diamond

This 1.56ct lab-grown radiant sits in the one-and-a-half to two carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG620429386 or 620429386. Listed at 21 retailers as of November 4, 2026, with a 830% 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

1.56
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle50.8°
Pavilion angle33°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620429386
Dimensions8.10 × 5.76 × 3.75 mm
L/W Ratio1.41
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
8.10 mm5.76 mm1.56 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620429386
Side View
Table 65.0%Crown 50.8°Girdle: MED-THKPavilion 33°Culet: NoneDepth 65.1%

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: $3,592 AUD|Low: $386 AUD|High: $4,034 AUD|Avg: $1,485 AUD|-11.0%
Brilliant Earth
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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
November 5, 2026
Retailer 12$386 AUD
Retailer 11$448 AUD
Retailer 21$479 AUD
Retailer 15$542 AUD
Retailer 3$706 AUD
Retailer 9$794 AUD
Retailer 19$847 AUD
Retailer 18$909 AUD
Retailer 2$928 AUD
Retailer 5$961 AUD
Retailer 7$1,179 AUD
Retailer 16$1,239 AUD
Retailer 20$1,470 AUD
Retailer 6$1,698 AUD
Retailer 17$1,809 AUD
Retailer 8$1,932 AUD
Retailer 10$1,980 AUD
Retailer 13$2,110 AUD
Retailer 14$2,855 AUD
Retailer 4$3,421 AUD
Brilliant Earth$3,592 AUD

11 data points across 21 retailers

21 retailers$386 AUD to $3,592 AUD

A
Cheapest Retailer
-
$386 AUD
A
Retailer 2
-
$448 AUD
View
A
Retailer 3
-
$479 AUD
View
A
Retailer 4
-
$542 AUD
View
A
Retailer 5
-
$706 AUD
View
A
Retailer 6
-
$794 AUD
View
A
Retailer 7
-
$847 AUD
View
A
Retailer 8
-
$909 AUD
View
A
Retailer 9
-
$928 AUD
View
A
Retailer 10
-
$961 AUD
View
A
Retailer 11
-
$1,179 AUD
View
B+
Retailer 12
-
$1,239 AUD
View
B+
Retailer 13
-
$1,470 AUD
View
B+
Retailer 14
-
$1,698 AUD
View
B+
Retailer 15
-
$1,809 AUD
View
B+
Retailer 16
-
$1,932 AUD
View
B+
Retailer 17
-
$1,980 AUD
View
B+
Retailer 18
-
$2,110 AUD
View
B
Retailer 19
-
$3,421 AUD
View
B
Retailer 20
-
$3,592 AUD
View
Most Expensive
Brilliant Earth
13715575B · Oct 21
$4,034 AUD
$2,830 USD
View
Price last confirmed 14 days ago
20 more retailers have this diamond
Prices start from $386 AUDSave up to $3,206 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
1.56ct Radiant
$386 AUD