Radiant|Lab Grown|IGI

1.57ct E FL Radiant Lab Grown Diamond

ID • E/FL • IGI LG818659743

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

Certificate IGI LG818659743

Diamond specifications and retailer prices

From $788 USD
As of October 30, 2026
Save $3,152 USD (80%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $3,940 USD at Brilliant Earth · As of October 29, 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 E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818659743 or 818659743. Listed at 8 retailers as of October 29, 2026, with prices from $788 to $3,940, a $3,152 spread on the same certified stone. Brilliant Earth lists it at $3,940. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.57
Carat
E
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.9°
Pavilion angle32.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818659743
Dimensions8.33 × 5.70 × 3.75 mm
L/W Ratio1.46
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
8.33 mm5.70 mm1.57 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818659743
Side View
Table 64.0%Crown 40.9°Girdle: MED-STKPavilion 32.5°Culet: NoneDepth 65.8%

Caratlytics Score

How it works →
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: $3,940 USD|Low: $506 USD|High: $4,570 USD|Avg: $2,012 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 12$506 USD
Retailer 8$788 USD
Retailer 5$825 USD
Retailer 11$1,170 USD
Retailer 3$1,198 USD
Retailer 7$1,327 USD
Retailer 10$1,752 USD
Retailer 2$2,028 USD
Retailer 4$2,469 USD
Retailer 9$3,530 USD
Retailer 6$3,560 USD
Brilliant Earth$3,940 USD

15 data points across 12 retailers

8 retailers$788 USD to $3,940 USD

A
Cheapest Retailer
-
$788 USD
A
Retailer 2
-
$825 USD
View
B+
Retailer 3
-
$1,327 USD
View
B+
Retailer 4
-
$1,752 USD
View
B+
Retailer 5
-
$2,028 USD
£1,597 GBP
View
Retailer 6
-
$3,530 USD
View
Price last confirmed 11 days ago
B
Retailer 7
-
$3,560 USD
View
Most Expensive
B
Brilliant Earth
21732334Y · Oct 29
$3,940 USD
View
7 more retailers have this diamond
Prices start from $788 USDSave up to $3,152 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. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.57ct Radiant
$788 USD