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Radiant|Lab Grown|IGI

1.57ct D IF Radiant Lab Grown Diamond

EX • D/IF • IGI LG771654551

Certificate IGI LG771654551

Diamond specifications and retailer prices

From $345 USD
Save $4,345 USD (93%) vs most expensive(unlock to see where)
26 retailers carry this diamond
Most expensive: $4,690 USD at Brilliant Earth
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 26 retailers, with prices from $345 to $4,690 at Brilliant Earth, a $4,345 spread on the same certified stone. 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
Color
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

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0-100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Sep 30
Current: $4,690 USD|Low: $275 USD|High: $4,690 USD|Avg: $1,400 USD
Brilliant Earth
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Retailer 25
October 1, 2026
Retailer 19$345 USD
Retailer 9$386 USD
Retailer 24$401 USD
Retailer 6$423 USD
Retailer 3$428 USD
Retailer 15$474 USD
Retailer 2$625 USD
Retailer 4$650 USD
Retailer 8$686 USD
Retailer 25$721 USD
Retailer 20$760 USD
Retailer 5$762 USD
Retailer 23$995 USD
Retailer 16$1,097 USD
Retailer 11$1,152 USD
Retailer 7$1,367 USD
Retailer 13$1,377 USD
Retailer 17$1,419 USD
Retailer 14$1,658 USD
Retailer 10$1,661 USD
Retailer 21$1,694 USD
Retailer 12$1,755 USD
Retailer 22$2,630 USD
Retailer 18$2,845 USD
Brilliant Earth$4,690 USD

40 data points across 25 retailers

26 retailers$345 USD to $4,690 USD

A
Cheapest Retailer
-
$345 USD
A
Retailer 2
-
$386 USD
View
A
Retailer 3
-
$401 USD
View
A
Retailer 4
-
$423 USD
View
A
Retailer 5
-
$428 USD
View
A
Retailer 6
-
$474 USD
HK$3,700 HKD
View
A
Retailer 7
-
$625 USD
View
A
Retailer 8
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$650 USD
View
A
Retailer 9
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$686 USD
View
A
Retailer 10
-
$721 USD
ZAR 11,646 ZAR
View
A
Retailer 11
-
$762 USD
£600 GBP
View
A
Retailer 12
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$762 USD
€726 EUR
View
A
Retailer 13
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$995 USD
A$1,530 AUD
View
A
Retailer 14
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$1,097 USD
View
A
Retailer 15
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$1,152 USD
View
B+
Retailer 16
-
$1,367 USD
SGD 1,847 SGD
View
B+
Retailer 17
-
$1,377 USD
View
B+
Retailer 18
-
$1,419 USD
View
B+
Retailer 19
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$1,568 USD
View
B+
Retailer 20
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$1,658 USD
View
B+
Retailer 21
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$1,661 USD
£1,308 GBP
View
B+
Retailer 22
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$1,694 USD
£1,334 GBP
View
B+
Retailer 23
-
$1,755 USD
View
B
Retailer 24
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$2,630 USD
View
B
Retailer 25
-
$2,845 USD
£2,240 GBP
View
Most Expensive
B
Brilliant Earth
17479782A · Sep 29
$4,690 USD
View
25 more retailers have this diamond
Prices start from $345 USDSave up to $4,345 USD

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.

A
1.57ct Radiant
$345 USD