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Radiant|Lab Grown|IGI

1.56ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG537215993

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

Certificate IGI LG537215993

Diamond specifications and retailer prices

From $178 USD
As of October 27, 2026
Save $942 USD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,120 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 1.56ct lab-grown radiant diamond

This 1.56ct 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 LG537215993 or 537215993. Listed at 18 retailers as of October 27, 2026, with prices from $178 to $1,120, a $942 spread on the same certified stone. Brilliant Earth lists it at $1,120. 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

1.56
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle34.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG537215993
Dimensions8.39 × 5.66 × 3.80 mm
L/W Ratio1.48
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
8.39 mm5.66 mm1.56 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG537215993
Side View
Table 61.0%Crown 32.2°Girdle: MED-STKPavilion 34.3°Culet: NoneDepth 67.1%

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 27
Current: $1,120 USD|Low: $171 USD|High: $1,120 USD|Avg: $503 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 3$178 USD
Retailer 5$221 USD
Retailer 7$226 USD
Retailer 11$226 USD
Retailer 8$291 USD
Retailer 14$370 USD
Retailer 2$399 USD
Retailer 9$409 USD
Retailer 6$558 USD
Retailer 15$567 USD
Retailer 4$710 USD
Retailer 10$782 USD
Retailer 13$865 USD
Retailer 12$1,038 USD
Brilliant Earth$1,120 USD

41 data points across 15 retailers

18 retailers$178 USD to $1,120 USD

A
Cheapest Retailer
-
$178 USD
A
Retailer 2
-
$207 USD
View
A
Retailer 3
-
$221 USD
View
A
Retailer 4
-
$226 USD
View
Final sale: no returns
A
Retailer 5
-
$226 USD
View
A
Retailer 6
-
$291 USD
£229 GBP
View
A
Retailer 7
-
$370 USD
€352 EUR
View
B+
Retailer 8
-
$399 USD
View
A
Retailer 9
-
$409 USD
£322 GBP
View
B+
Retailer 10
-
$472 USD
View
B+
Retailer 11
-
$558 USD
View
B+
Retailer 12
-
$567 USD
View
B+
Retailer 13
-
$710 USD
View
B+
Retailer 14
-
$733 USD
£577 GBP
View
B+
Retailer 15
-
$782 USD
View
Retailer 16
-
$865 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
$1,038 USD
£817 GBP
View
Most Expensive
B
Brilliant Earth
14996947A · Oct 29
$1,120 USD
View
17 more retailers have this diamond
Prices start from $178 USDSave up to $942 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
1.56ct Radiant
$178 USD