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Radiant|Lab Grown|IGI

1.55ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG744515287

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

Certificate IGI LG744515287

Diamond specifications and retailer prices

From $406 AUD
As of November 4, 2026
Save $3,357 AUD (89%) vs most expensive(unlock to see where)
32 retailers carry this diamond
Most expensive: $4,775 AUD at Brilliant Earth · As of October 17, 2026
View at Brilliant Earth

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 LG744515287 or 744515287. Listed at 32 retailers as of November 4, 2026, with a 826% 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

1.55
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.3°
Pavilion angle33.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG744515287
Dimensions5.70 × 5.70 × 3.76 mm
L/W Ratio1.00
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
5.70 mm5.70 mm1.55 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG744515287
Side View
Table 63.0%Crown 42.3°Girdle: Slightly ThickPavilion 33.9°Culet: NoneDepth 66.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $4,775 AUD|Low: $406 AUD|High: $4,775 AUD|Avg: $1,723 AUD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
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Retailer 6
Retailer 7
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Retailer 23
November 5, 2026
Retailer 20$406 AUD
Retailer 16$507 AUD
Retailer 19$587 AUD
Retailer 17$727 AUD
Retailer 18$747 AUD
Retailer 22$784 AUD
Retailer 6$907 AUD
Retailer 2$982 AUD
Retailer 10$999 AUD
Retailer 15$1,179 AUD
Retailer 8$1,253 AUD
Retailer 5$1,307 AUD
Retailer 23$1,550 AUD
Retailer 21$1,790 AUD
Retailer 7$1,939 AUD
Retailer 9$2,021 AUD
Retailer 3$2,084 AUD
Retailer 4$2,154 AUD
Retailer 13$2,224 AUD
Retailer 11$2,385 AUD
Retailer 12$3,500 AUD
Retailer 14$3,763 AUD
Brilliant Earth$4,775 AUD

34 data points across 23 retailers

32 retailers$406 AUD to $3,763 AUD

A
Cheapest Retailer
-
$406 AUD
Retailer 2
-
$423 AUD
View
Price last confirmed 28 days ago
Retailer 3
-
$450 AUD
View
Price last confirmed 36 days ago
A
Retailer 4
-
$507 AUD
View
Final sale: no returns
Retailer 5
-
$523 AUD
View
Price last confirmed 39 days ago
Retailer 6
-
$526 AUD
View
Price last confirmed 33 days ago
Retailer 7
-
$552 AUD
View
Price last confirmed 37 days ago
A
Retailer 8
-
$587 AUD
View
A
Retailer 9
-
$727 AUD
View
A
Retailer 10
-
$747 AUD
View
A
Retailer 11
-
$784 AUD
View
A
Retailer 12
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$898 AUD
View
A
Retailer 13
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$907 AUD
View
A
Retailer 14
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$982 AUD
View
A
Retailer 15
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$999 AUD
View
Retailer 16
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$1,025 AUD
View
Price last confirmed 21 days ago
A
Retailer 17
-
$1,179 AUD
View
A
Retailer 18
-
$1,253 AUD
View
A
Retailer 19
-
$1,307 AUD
View
B+
Retailer 20
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$1,550 AUD
View
B+
Retailer 21
-
$1,790 AUD
View
Retailer 22
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$1,865 AUD
View
Price last confirmed 26 days ago
B+
Retailer 23
-
$1,939 AUD
View
Retailer 24
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$1,983 AUD
View
Price last confirmed 36 days ago
B+
Retailer 25
-
$2,021 AUD
View
B+
Retailer 26
-
$2,084 AUD
View
B+
Retailer 27
-
$2,154 AUD
View
B+
Retailer 28
-
$2,224 AUD
View
B+
Retailer 29
-
$2,385 AUD
View
Retailer 30
-
$3,500 AUD
View
Price last confirmed 8 days ago
B
Retailer 31
-
$3,763 AUD
View
Most Expensive
Brilliant Earth
17456976Y · Oct 17
$4,775 AUD
$3,350 USD
View
Price last confirmed 18 days ago
31 more retailers have this diamond
Prices start from $406 AUDSave up to $3,357 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
$406 AUD