Radiant|Lab Grown|IGI

1.50ct E SI1 Radiant Lab Grown Diamond

EX • E/SI1 • IGI LG647447808

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

Certificate IGI LG647447808

Diamond specifications and retailer prices

From $209 USD
As of October 25, 2026
Save $1,001 USD (83%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,210 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.5ct lab-grown radiant diamond

This 1.5ct 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 LG647447808 or 647447808. Listed at 16 retailers as of October 25, 2026, with prices from $209 to $1,210, a $1,001 spread on the same certified stone. Brilliant Earth lists it at $1,210. 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

1.50
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.6°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG647447808
Dimensions7.93 × 5.74 × 3.82 mm
L/W Ratio1.38
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.93 mm5.74 mm1.50 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG647447808
Side View
Table 66.0%Crown 42.6°Girdle: MediumPavilion 35.3°Culet: NoneDepth 66.6%

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 25
Current: $1,210 USD|Low: $196 USD|High: $1,290 USD|Avg: $525 USD|-6.2%
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 30, 2026
Retailer 14$196 USD
Retailer 4$206 USD
Retailer 8$209 USD
Retailer 11$269 USD
Retailer 2$371 USD
Retailer 12$375 USD
Retailer 3$390 USD
Retailer 10$396 USD
Retailer 6$438 USD
Retailer 5$545 USD
Retailer 9$710 USD
Retailer 13$865 USD
Retailer 7$983 USD
Brilliant Earth$1,210 USD

38 data points across 14 retailers

16 retailers$209 USD to $1,210 USD

Retailer 1
-
$196 USD
Price last confirmed 32 days ago
Retailer 2
-
$206 USD
View
Price last confirmed 32 days ago
Retailer 3
-
$209 USD
View
Price last confirmed 18 days ago
A
Retailer 4
-
$209 USD
View
Retailer 5
-
$269 USD
£212 GBP
View
Price last confirmed 13 days ago
A
Retailer 6
-
$371 USD
£292 GBP
View
B+
Retailer 7
-
$375 USD
View
Retailer 8
-
$390 USD
£307 GBP
View
Price last confirmed 21 days ago
A
Retailer 9
-
$396 USD
€377 EUR
View
B+
Retailer 10
-
$438 USD
View
B+
Retailer 11
-
$545 USD
View
B
Retailer 12
-
$710 USD
View
B
Retailer 13
-
$734 USD
£578 GBP
View
Retailer 14
-
$865 USD
View
Price last confirmed 8 days ago
B
Retailer 15
-
$983 USD
£774 GBP
View
Most Expensive
B
Brilliant Earth
11455293A · Oct 29
$1,210 USD
View
15 more retailers have this diamond
Prices start from $209 USDSave up to $1,001 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
1.50ct Radiant
$209 USD