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Radiant|Lab Grown|IGI

1.55ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG743509309

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

Certificate IGI LG743509309

Diamond specifications and retailer prices

From $449 AUD
As of November 4, 2026
Save $3,713 AUD (89%) vs most expensive(unlock to see where)
31 retailers carry this diamond
Most expensive: $4,162 AUD at Brilliant Earth · As of November 4, 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 LG743509309 or 743509309. Listed at 31 retailers as of November 4, 2026, with prices from $449 to $4,162, a $3,713 spread on the same certified stone. Brilliant Earth lists it at $4,162. 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 angle42.5°
Pavilion angle32.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG743509309
Dimensions8.16 × 5.85 × 3.74 mm
L/W Ratio1.39
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
8.16 mm5.85 mm1.55 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG743509309
Side View
Table 65.0%Crown 42.5°Girdle: MED-STKPavilion 32.7°Culet: NoneDepth 63.9%

Caratlytics Score

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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: $4,162 AUD|Low: $449 AUD|High: $5,959 AUD|Avg: $1,689 AUD|-30.1%
Brilliant Earth
Retailer 2
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Retailer 22
November 5, 2026
Retailer 18$449 AUD
Retailer 19$503 AUD
Retailer 17$639 AUD
Retailer 16$777 AUD
Retailer 21$784 AUD
Retailer 6$907 AUD
Retailer 15$948 AUD
Retailer 2$982 AUD
Retailer 11$999 AUD
Retailer 9$1,253 AUD
Retailer 5$1,307 AUD
Retailer 14$1,521 AUD
Retailer 22$1,634 AUD
Retailer 20$1,790 AUD
Retailer 7$1,852 AUD
Retailer 10$1,855 AUD
Retailer 4$1,865 AUD
Retailer 8$2,141 AUD
Retailer 3$2,224 AUD
Retailer 13$2,224 AUD
Retailer 12$3,671 AUD
Brilliant Earth$4,162 AUD

34 data points across 22 retailers

31 retailers$449 AUD to $4,162 AUD

A
Cheapest Retailer
-
$449 AUD
Retailer 2
-
$468 AUD
View
Price last confirmed 28 days ago
Retailer 3
-
$497 AUD
View
Price last confirmed 36 days ago
A
Retailer 4
-
$503 AUD
View
Final sale: no returns
Retailer 5
-
$577 AUD
View
Price last confirmed 39 days ago
Retailer 6
-
$580 AUD
View
Price last confirmed 33 days ago
Retailer 7
-
$609 AUD
View
Price last confirmed 39 days ago
Retailer 8
-
$609 AUD
View
Price last confirmed 36 days ago
A
Retailer 9
-
$639 AUD
View
A
Retailer 10
-
$777 AUD
View
A
Retailer 11
-
$784 AUD
View
A
Retailer 12
-
$907 AUD
View
A
Retailer 13
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$948 AUD
View
A
Retailer 14
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$982 AUD
View
A
Retailer 15
-
$999 AUD
View
A
Retailer 16
-
$1,253 AUD
View
A
Retailer 17
-
$1,307 AUD
View
B+
Retailer 18
-
$1,521 AUD
View
B+
Retailer 19
-
$1,634 AUD
View
B+
Retailer 20
-
$1,790 AUD
View
B+
Retailer 21
-
$1,852 AUD
View
B+
Retailer 22
-
$1,855 AUD
View
Retailer 23
-
$1,865 AUD
View
Price last confirmed 26 days ago
B+
Retailer 24
-
$1,865 AUD
View
Retailer 25
-
$1,983 AUD
View
Price last confirmed 36 days ago
B+
Retailer 26
-
$2,141 AUD
View
B+
Retailer 27
-
$2,224 AUD
View
B+
Retailer 28
-
$2,224 AUD
View
Retailer 29
-
$2,405 AUD
View
Price last confirmed 34 days ago
Retailer 30
-
$3,671 AUD
View
Price last confirmed 8 days ago
Most Expensive
B
Brilliant Earth
16656137A · Nov 4
$4,162 AUD
$2,920 USD
View
30 more retailers have this diamond
Prices start from $449 AUDSave up to $3,713 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