Radiant|Lab Grown|IGI

1.55ct E SI1 Radiant Lab Grown Diamond

EX • E/SI1 • IGI LG641483559

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

Certificate IGI LG641483559

Diamond specifications and retailer prices

From $177 USD
As of October 27, 2026
Save $973 USD (85%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $1,150 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG641483559 or 641483559. Listed at 19 retailers as of October 27, 2026, with prices from $177 to $1,150, a $973 spread on the same certified stone. Brilliant Earth lists it at $1,150. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.55
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG641483559
Dimensions8.24 × 5.68 × 3.73 mm
L/W Ratio1.45
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.24 mm5.68 mm1.55 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG641483559
Side View
Table 63.0%Crown 43°Girdle: MED-STKPavilion 35.1°Culet: NoneDepth 65.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: $1,150 USD|Low: $170 USD|High: $1,150 USD|Avg: $495 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
Retailer 13
Retailer 14
Retailer 15
October 30, 2026
Retailer 5$177 USD
Retailer 7$220 USD
Retailer 12$225 USD
Retailer 14$225 USD
Retailer 9$289 USD
Retailer 15$370 USD
Retailer 2$397 USD
Retailer 10$406 USD
Retailer 4$563 USD
Retailer 6$706 USD
Retailer 11$778 USD
Retailer 3$865 USD
Retailer 13$1,033 USD
Retailer 8$1,135 USD
Brilliant Earth$1,150 USD

37 data points across 15 retailers

19 retailers$177 USD to $1,150 USD

A
Cheapest Retailer
-
$177 USD
A
Retailer 2
-
$205 USD
View
A
Retailer 3
-
$220 USD
View
A
Retailer 4
-
$225 USD
View
Final sale: no returns
A
Retailer 5
-
$225 USD
View
A
Retailer 6
-
$289 USD
£228 GBP
View
A
Retailer 7
-
$370 USD
€352 EUR
View
B+
Retailer 8
-
$397 USD
View
A
Retailer 9
-
$406 USD
£320 GBP
View
B+
Retailer 10
-
$466 USD
View
B+
Retailer 11
-
$556 USD
View
B+
Retailer 12
-
$563 USD
View
B+
Retailer 13
-
$706 USD
View
B+
Retailer 14
-
$778 USD
View
B
Retailer 15
-
$789 USD
£621 GBP
View
Retailer 16
-
$865 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
$1,033 USD
£813 GBP
View
B
Retailer 18
-
$1,135 USD
View
Most Expensive
B
Brilliant Earth
14997655A · Oct 29
$1,150 USD
View
18 more retailers have this diamond
Prices start from $177 USDSave up to $973 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
$177 USD