Radiant|Lab Grown|IGI

1.55ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG614322823

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

Certificate IGI LG614322823

Diamond specifications and retailer prices

From $756 USD
£595 GBP
As of October 29, 2026
12 retailers carry this diamond
Most expensive: $1,240 USD at Brilliant Earth · As of October 17, 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 LG614322823 or 614322823. Listed at 12 retailers as of October 29, 2026. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.8°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG614322823
Dimensions8.05 × 5.74 × 3.90 mm
L/W Ratio1.40
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
8.05 mm5.74 mm1.55 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG614322823
Side View
Table 65.0%Crown 43.8°Girdle: MED-STKPavilion 35.4°Culet: NoneDepth 67.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 29
Current: $1,240 USD|Low: $173 USD|High: $1,330 USD|Avg: $528 USD|-6.8%
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
October 17, 2026
Retailer 12$173 USD
Retailer 4$201 USD
Retailer 7$215 USD
Retailer 10$215 USD
Retailer 8$278 USD
Retailer 9$375 USD
Retailer 3$384 USD
Retailer 2$407 USD
Retailer 6$465 USD
Retailer 5$552 USD
Retailer 14$660 USD
Retailer 13$691 USD
Retailer 11$1,017 USD
Brilliant Earth$1,240 USD

26 data points across 14 retailers

12 retailers

Retailer 1
-
$173 USD
Price last confirmed 21 days ago
Retailer 2
-
$201 USD
View
Price last confirmed 32 days ago
Retailer 3
-
$215 USD
View
Price last confirmed 14 days ago
Retailer 4
-
$215 USD
View
Price last confirmed 15 days ago
Retailer 5
-
$278 USD
£219 GBP
View
Price last confirmed 14 days ago
Retailer 6
-
$375 USD
£295 GBP
View
Price last confirmed 14 days ago
Retailer 7
-
$384 USD
View
Price last confirmed 14 days ago
Retailer 8
-
$660 USD
View
Price last confirmed 17 days ago
Retailer 9
-
$691 USD
View
Price last confirmed 22 days ago
B
Retailer 10
-
$756 USD
£595 GBP
View
Retailer 11
-
$1,017 USD
£801 GBP
View
Price last confirmed 19 days ago
Most Expensive
Brilliant Earth
8851381A · Oct 17
$1,240 USD
View
Price last confirmed 12 days ago
11 more retailers have this diamond
Prices start from $756 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.

B
1.55ct Radiant
$756 USD