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Radiant|Lab Grown|IGI

1.57ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG771654551

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

Certificate IGI LG771654551

Diamond specifications and retailer prices

From $454 AUD
$319 USD
As of October 30, 2026
Save $3,731 AUD (89%) vs most expensive(unlock to see where)
29 retailers carry this diamond
Most expensive: $6,463 AUD at Brilliant Earth · As of October 24, 2026
View at Brilliant Earth

About this 1.57ct lab-grown radiant diamond

This 1.57ct 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 LG771654551 or 771654551. Listed at 29 retailers as of October 30, 2026, with a 822% 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

1.57
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.4°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG771654551
Dimensions8.56 × 5.75 × 3.74 mm
L/W Ratio1.49
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
8.56 mm5.75 mm1.57 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG771654551
Side View
Table 61.0%Crown 38.4°Girdle: MED-STKPavilion 34.9°Culet: NoneDepth 65.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $4,185 AUD|Low: $448 AUD|High: $6,463 AUD|Avg: $1,532 AUD|-35.2%
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 26
November 1, 2026
Retailer 17$448 AUD
Retailer 10$454 AUD
Retailer 8$504 AUD
Retailer 12$504 AUD
Retailer 16$521 AUD
Retailer 13$589 AUD
Retailer 9$711 AUD
Retailer 26$726 AUD
Retailer 21$736 AUD
Retailer 3$878 AUD
Retailer 25$957 AUD
Retailer 22$993 AUD
Retailer 20$1,070 AUD
Retailer 7$1,203 AUD
Retailer 23$1,297 AUD
Retailer 5$1,549 AUD
Retailer 11$1,789 AUD
Retailer 19$1,855 AUD
Retailer 6$1,940 AUD
Retailer 15$2,070 AUD
Retailer 14$2,084 AUD
Retailer 18$2,170 AUD
Retailer 2$2,231 AUD
Retailer 24$3,509 AUD
Retailer 4$3,616 AUD
Brilliant Earth$4,185 AUD

26 data points across 26 retailers

29 retailers$454 AUD to $4,185 AUD

Retailer 1
-
$448 AUD
$315 USD
Price last confirmed 10 days ago
A
Retailer 2
-
$454 AUD
$319 USD
View
Final sale: no returns
Retailer 3
-
$504 AUD
$354 USD
View
Price last confirmed 7 days ago
A
Retailer 4
-
$504 AUD
$354 USD
View
Retailer 5
-
$521 AUD
$366 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
$589 AUD
£326 GBP
View
A
Retailer 7
-
$711 AUD
HK$3,900 HKD
View
A
Retailer 8
-
$726 AUD
$510 USD
View
A
Retailer 9
-
$736 AUD
$517 USD
View
A
Retailer 10
-
$878 AUD
$617 USD
View
A
Retailer 11
-
$957 AUD
ZAR 10,856 ZAR
View
A
Retailer 12
-
$993 AUD
£549 GBP
View
A
Retailer 13
-
$1,070 AUD
€716 EUR
View
A
Retailer 14
-
$1,203 AUD
$845 USD
View
A
Retailer 15
-
$1,297 AUD
View
A
Retailer 16
-
$1,549 AUD
$1,088 USD
View
B+
Retailer 17
-
$1,789 AUD
$1,257 USD
View
B+
Retailer 18
-
$1,855 AUD
$1,303 USD
View
B+
Retailer 19
-
$1,896 AUD
$1,332 USD
View
B+
Retailer 20
-
$1,940 AUD
$1,363 USD
View
B+
Retailer 21
-
$2,070 AUD
SGD 1,965 SGD
View
B+
Retailer 22
-
$2,084 AUD
$1,464 USD
View
Retailer 23
-
$2,170 AUD
£1,200 GBP
View
Price last confirmed 10 days ago
B+
Retailer 24
-
$2,231 AUD
£1,234 GBP
View
B+
Retailer 25
-
$3,509 AUD
$2,465 USD
View
B
Retailer 26
-
$3,616 AUD
$2,540 USD
View
B
Retailer 27
-
$4,050 AUD
£2,240 GBP
View
B
Retailer 28
-
$4,185 AUD
$2,940 USD
View
Most Expensive
Brilliant Earth
17479782A · Oct 24
$6,463 AUD
$4,540 USD
View
Price last confirmed 7 days ago
28 more retailers have this diamond
Prices start from $454 AUDSave up to $3,731 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
1.57ct Radiant
$454 AUD