Radiant|Lab Grown|IGI

1.55ct E FL Radiant Lab Grown Diamond

ID • E/FL • IGI LG786656406

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

Certificate IGI LG786656406

Diamond specifications and retailer prices

From $449 USD
As of October 30, 2026
Save $3,471 USD (89%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $3,920 USD at Brilliant Earth · As of October 29, 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 E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG786656406 or 786656406. Listed at 23 retailers as of October 29, 2026, with prices from $449 to $3,920, a $3,471 spread on the same certified stone. Brilliant Earth lists it at $3,920. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.55
Carat
E
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.9°
Pavilion angle36°
OriginLab Grown
Grading LabIGI
CertificateIGI LG786656406
Dimensions8.37 × 5.63 × 3.72 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
8.37 mm5.63 mm1.55 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG786656406
Side View
Table 68.0%Crown 44.9°Girdle: Slightly ThickPavilion 36°Culet: NoneDepth 66.1%

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: $3,920 USD|Low: $449 USD|High: $3,930 USD|Avg: $1,610 USD|-0.3%
Brilliant Earth
Retailer 2
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Retailer 21
October 30, 2026
Retailer 9$449 USD
Retailer 19$503 USD
Retailer 17$527 USD
Retailer 8$557 USD
Retailer 16$700 USD
Retailer 21$796 USD
Retailer 4$873 USD
Retailer 3$886 USD
Retailer 2$921 USD
Retailer 15$957 USD
Retailer 6$1,116 USD
Retailer 5$1,346 USD
Retailer 7$1,790 USD
Retailer 20$1,823 USD
Retailer 12$1,948 USD
Retailer 11$2,014 USD
Retailer 14$2,042 USD
Retailer 13$2,057 USD
Retailer 18$2,085 USD
Retailer 10$3,510 USD
Brilliant Earth$3,920 USD

26 data points across 21 retailers

23 retailers$449 USD to $3,920 USD

A
Cheapest Retailer
-
$449 USD
A
Retailer 2
-
$503 USD
View
A
Retailer 3
-
$527 USD
View
Final sale: no returns
A
Retailer 4
-
$557 USD
View
Retailer 5
-
$617 USD
View
Price last confirmed 13 days ago
A
Retailer 6
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$700 USD
View
A
Retailer 7
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$796 USD
View
A
Retailer 8
-
$873 USD
View
A
Retailer 9
-
$886 USD
€844 EUR
View
A
Retailer 10
-
$921 USD
£725 GBP
View
A
Retailer 11
-
$957 USD
ZAR 15,462 ZAR
View
A
Retailer 12
-
$1,116 USD
View
B+
Retailer 13
-
$1,346 USD
View
B+
Retailer 14
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$1,790 USD
View
B+
Retailer 15
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$1,823 USD
View
B+
Retailer 16
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$1,940 USD
View
B+
Retailer 17
-
$1,948 USD
SGD 2,633 SGD
View
B
Retailer 18
-
$2,014 USD
View
Retailer 19
-
$2,042 USD
£1,608 GBP
View
Price last confirmed 20 days ago
B+
Retailer 20
-
$2,057 USD
£1,620 GBP
View
B+
Retailer 21
-
$2,085 USD
View
Retailer 22
-
$3,510 USD
View
Price last confirmed 11 days ago
Most Expensive
B
Brilliant Earth
21419895A · Oct 29
$3,920 USD
View
22 more retailers have this diamond
Prices start from $449 USDSave up to $3,471 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
1.55ct Radiant
$449 USD