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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 $259 AUD
$182 USD
As of October 30, 2026
Save $1,335 AUD (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,594 AUD 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 29, 2026, with prices from $259 to $1,594, a $1,335 spread on the same certified stone. Brilliant Earth lists it at $1,594. 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
Colour
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 30
Current: $1,594 AUD|Low: $243 AUD|High: $1,594 AUD|Avg: $752 AUD
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 8$259 AUD
Retailer 6$315 AUD
Retailer 13$322 AUD
Retailer 2$332 AUD
Retailer 10$414 AUD
Retailer 3$526 AUD
Retailer 9$568 AUD
Retailer 11$582 AUD
Retailer 7$794 AUD
Retailer 4$807 AUD
Retailer 5$1,011 AUD
Retailer 12$1,113 AUD
Retailer 15$1,231 AUD
Retailer 14$1,477 AUD
Brilliant Earth$1,594 AUD

40 data points across 15 retailers

18 retailers$259 AUD to $1,594 AUD

A
Cheapest Retailer
-
$259 AUD
$182 USD
A
Retailer 2
-
$295 AUD
$207 USD
View
A
Retailer 3
-
$315 AUD
$221 USD
View
A
Retailer 4
-
$322 AUD
$226 USD
View
A
Retailer 5
-
$332 AUD
$233 USD
View
Final sale: no returns
A
Retailer 6
-
$414 AUD
£229 GBP
View
A
Retailer 7
-
$526 AUD
€352 EUR
View
B+
Retailer 8
-
$568 AUD
$399 USD
View
A
Retailer 9
-
$582 AUD
£322 GBP
View
A
Retailer 10
-
$672 AUD
$472 USD
View
B+
Retailer 11
-
$794 AUD
$558 USD
View
B+
Retailer 12
-
$807 AUD
$567 USD
View
B+
Retailer 13
-
$1,011 AUD
$710 USD
View
B
Retailer 14
-
$1,043 AUD
£577 GBP
View
B+
Retailer 15
-
$1,113 AUD
$782 USD
View
Retailer 16
-
$1,231 AUD
$865 USD
View
Price last confirmed 11 days ago
B
Retailer 17
-
$1,477 AUD
£817 GBP
View
Most Expensive
B
Brilliant Earth
14996947A · Oct 29
$1,594 AUD
$1,120 USD
View
17 more retailers have this diamond
Prices start from $259 AUDSave up to $1,335 AUD

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
$259 AUD