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Radiant|Lab Grown|IGI

1.57ct D IF Radiant Lab Grown Diamond

ID • D/IF • IGI LG729589868

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

Certificate IGI LG729589868

Diamond specifications and retailer prices

From $429 AUD
$301 USD
As of October 30, 2026
Save $3,757 AUD (90%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $4,185 AUD at Brilliant Earth · As of October 31, 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 LG729589868 or 729589868. Listed at 27 retailers as of October 30, 2026, with prices from $429 to $4,185, a $3,757 spread on the same certified stone. Brilliant Earth lists it at $4,185. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39°
Pavilion angle33.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG729589868
Dimensions8.70 × 5.86 × 3.63 mm
L/W Ratio1.48
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
8.70 mm5.86 mm1.57 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG729589868
Side View
Table 62.0%Crown 39°Girdle: MED-STKPavilion 33.3°Culet: NoneDepth 61.9%

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: Oct 30
Current: $4,185 AUD|Low: $411 AUD|High: $4,826 AUD|Avg: $1,663 AUD|-13.3%
Brilliant Earth
Retailer 2
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November 1, 2026
Retailer 4$429 AUD
Retailer 25$497 AUD
Retailer 6$512 AUD
Retailer 3$531 AUD
Retailer 21$641 AUD
Retailer 24$784 AUD
Retailer 9$826 AUD
Retailer 15$904 AUD
Retailer 20$952 AUD
Retailer 23$1,007 AUD
Retailer 13$1,050 AUD
Retailer 16$1,146 AUD
Retailer 10$1,206 AUD
Retailer 17$1,328 AUD
Retailer 22$1,367 AUD
Retailer 7$1,631 AUD
Retailer 5$1,885 AUD
Retailer 12$2,041 AUD
Retailer 18$2,113 AUD
Retailer 11$2,151 AUD
Retailer 19$2,251 AUD
Retailer 2$2,349 AUD
Retailer 8$2,443 AUD
Retailer 26$3,502 AUD
Retailer 14$3,801 AUD
Brilliant Earth$4,185 AUD

35 data points across 26 retailers

27 retailers$429 AUD to $4,185 AUD

A
Cheapest Retailer
-
$429 AUD
$301 USD
A
Retailer 2
-
$497 AUD
$349 USD
View
A
Retailer 3
-
$512 AUD
$360 USD
View
Final sale: no returns
A
Retailer 4
-
$531 AUD
$373 USD
View
A
Retailer 5
-
$641 AUD
$450 USD
View
A
Retailer 6
-
$784 AUD
HK$4,300 HKD
View
A
Retailer 7
-
$826 AUD
$580 USD
View
A
Retailer 8
-
$904 AUD
$635 USD
View
A
Retailer 9
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$952 AUD
€637 EUR
View
A
Retailer 10
-
$1,007 AUD
ZAR 11,431 ZAR
View
A
Retailer 11
-
$1,050 AUD
£581 GBP
View
A
Retailer 12
-
$1,146 AUD
View
A
Retailer 13
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$1,206 AUD
$847 USD
View
A
Retailer 14
-
$1,328 AUD
$933 USD
View
A
Retailer 15
-
$1,367 AUD
View
B+
Retailer 16
-
$1,631 AUD
$1,146 USD
View
B+
Retailer 17
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$1,885 AUD
$1,324 USD
View
B+
Retailer 18
-
$2,041 AUD
$1,434 USD
View
B+
Retailer 19
-
$2,113 AUD
$1,484 USD
View
B+
Retailer 20
-
$2,151 AUD
$1,511 USD
View
B+
Retailer 21
-
$2,251 AUD
SGD 2,137 SGD
View
B+
Retailer 22
-
$2,349 AUD
£1,299 GBP
View
Retailer 23
-
$2,443 AUD
View
Price last confirmed 24 days ago
B
Retailer 24
-
$3,502 AUD
$2,460 USD
View
Retailer 25
-
$3,531 AUD
$2,480 USD
View
Price last confirmed 103 days ago
B
Retailer 26
-
$3,801 AUD
$2,670 USD
View
Most Expensive
B
Brilliant Earth
16223276Y · Oct 31
$4,185 AUD
$2,940 USD
View
26 more retailers have this diamond
Prices start from $429 AUDSave up to $3,757 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
$429 AUD