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Radiant|Lab Grown|IGI

1.55ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG648445944

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

Certificate IGI LG648445944

Diamond specifications and retailer prices

From $449 AUD
As of November 4, 2026
Save $4,056 AUD (90%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: $4,505 AUD at Diamond Quarter · As of November 2, 2026
View at Diamond Quarter

About this 1.55ct lab-grown radiant diamond

This 1.55ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG648445944 or 648445944. Listed at 25 retailers as of November 2, 2026, with prices from $449 to $4,505, a $4,056 spread on the same certified stone. Diamond Quarter lists it at $4,505. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.3°
Pavilion angle35°
OriginLab Grown
Grading LabIGI
CertificateIGI LG648445944
Dimensions8.41 × 5.77 × 3.85 mm
L/W Ratio1.46
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
8.41 mm5.77 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG648445944
Side View
Table 63.0%Crown 39.3°Girdle: MediumPavilion 35°Culet: NoneDepth 66.7%

Caratlytics Score

How it works →
A+
Exceptional
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: $982 AUD|Low: $449 AUD|High: $3,713 AUD|Avg: $1,357 AUD
Retailer 1
Retailer 2
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Retailer 21
November 5, 2026
Retailer 4$449 AUD
Retailer 17$503 AUD
Retailer 21$520 AUD
Retailer 3$557 AUD
Retailer 13$639 AUD
Retailer 15$777 AUD
Retailer 7$784 AUD
Retailer 18$907 AUD
Retailer 10$927 AUD
Retailer 16$959 AUD
Retailer 1$982 AUD
Retailer 11$1,253 AUD
Retailer 12$1,307 AUD
Retailer 8$1,514 AUD
Retailer 6$1,634 AUD
Retailer 5$1,790 AUD
Retailer 14$1,855 AUD
Retailer 9$2,224 AUD
Retailer 20$2,234 AUD
Retailer 19$2,363 AUD
Retailer 2$3,699 AUD

35 data points across 21 retailers

25 retailers$449 AUD to $4,505 AUD

A+
Cheapest Retailer
-
$449 AUD
A
Retailer 2
-
$503 AUD
View
Final sale: no returns
A
Retailer 3
-
$520 AUD
View
A
Retailer 4
-
$557 AUD
View
A
Retailer 5
-
$639 AUD
View
A
Retailer 6
-
$777 AUD
View
A
Retailer 7
-
$784 AUD
View
A
Retailer 8
-
$907 AUD
View
A
Retailer 9
-
$927 AUD
View
A
Retailer 10
-
$959 AUD
View
A
Retailer 11
-
$982 AUD
View
A
Retailer 12
-
$1,253 AUD
View
A
Retailer 13
-
$1,307 AUD
View
B+
Retailer 14
-
$1,514 AUD
View
B+
Retailer 15
-
$1,634 AUD
View
B+
Retailer 16
-
$1,790 AUD
View
B+
Retailer 17
-
$1,852 AUD
View
B+
Retailer 18
-
$1,855 AUD
View
B+
Retailer 19
-
$1,865 AUD
View
B+
Retailer 20
-
$2,224 AUD
View
Retailer 21
-
$2,234 AUD
View
Price last confirmed 10 days ago
B+
Retailer 22
-
$2,363 AUD
View
Retailer 23
-
$3,699 AUD
View
Price last confirmed 8 days ago
Retailer 24
-
$3,721 AUD
View
Price last confirmed 38 days ago
Most Expensive
B
Diamond Quarter
1.55IFDLG4480A4N · Nov 2
$4,505 AUD
£2,488 GBP
View
24 more retailers have this diamond
Prices start from $449 AUDSave up to $4,056 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+
1.55ct Radiant
$449 AUD